I didn't read the article, because I can't stand Andrew Bolt, and frankly I can't be bothered, but I'll assess your writing.
Okay, first off, you should never give any indication of what your opinion on the issue is. So don't say that the Gillard's policy is "flawed" unless you're saying something like "Bolt sees the policy as flawed." All you should be doing, is discussing the way Bolt writes. Also, the contentions don't need to be quite so specific. For Bolt's contention something like "the Gillard government's policies are somewhat responsible for deaths\causing deaths and should be reviewed" and for Oakeshott "greater transparency is needed regarding the Christmas Island tragedy, which he sees as being poorly handled by the government".
I wouldn't use two sentences to describe your target. Instead, when you're talking about the writers, write something liek "Andrew Bolt aims to convince Herald Sun readers that..." or "Rob Oakeshott wishes to make readers, particularly those in positions of power, feel that..." You don't need to specifically mention the target audience in the introduction, just make it obvious that you understand the context of the article.
"The writer of the Herald Sun dysphemistically describes the asylum seekers’ journey to Australia as ‘hazardous’ as they encounter ‘raging seas’ and hearing ‘the desperate cries of the asylum seekers cast into the sea’. "
rewrite this sentence. It doesn't really make sense grammatically. Also, this entire paragraph suggests that you argree with the writer, which, once again, you shouldn't be doing. Also, you're not telling the examiners what sort of emotions "may be invoked", but what sort of emotions the writer WANTS to evoke. Make sure you focus on the writer and what he wants people to feel.
"As a result, these suggestions such as ‘[considering] Tony Abbott’s demand to turn back the boats’ and helping to solve the problem by ‘the reinstatement of temporary protection visas’ may be seen as logical and acceptable by the readers."
rewrite this sentence. I don't even know what you're saying.
"by the same token"
Avoid cliches. You're writing a formal essay, and your writing should be clear and concise.
Also, don't use the word "vibe". It's too informal. Use "tone".
The last sentence is somewhat obsolete. It doesn't really tell us much about what the writer is telling us to do, except that he wants to be taken seriously. Make sure all of your sentences have a purpose, and reveal something about the writer's intention.
"clump" is too informal.
And even the suggestion of readers being "confronted" by the "implications of the lack of action" sounds far too biased. The next sentence I don't really understand. Try to avoid trying to sound clever at this point, and put things as simply as you can, to make sure that you're being clear and you'll be easily understood. The sentence after needs proofreading.
I don't think that "online multimedia" 'substantiates' the arguments as such. Look up the word substantiate. I don't think it's appropriate. I don't know if 'integrating' is the right word either. It doesn't really feel right.
"points out that this incident is a result of the flawed policies, invoking a sense of sympathy from the readers, and spawn disapproval for the policies." given what I've already said, I think you should know why this isn't good to write.
"In contrast, the video accompanying Oakeshott’s piece is an excerpt from a news report and gives a neutral perspective on the incident. This is in line with Oakeshott’s emotionally detached piece, giving the impression that his opinions are not clouded by emotions and thus may make the readers more inclined to accept his views. "
This part of the essay is particularly well-written and perceptive. I probably haven't said enough nice things about this essay, which is actually quite a good attempt.
"resides" isn't really the right word in that sentence.
"
Both articles are related to the Christmas Island tragedy, although the Herald Sun resides in calling for a change to the policies and invoking compassion and awareness of the issue in the readers through intricate use of tone, connotations and multimedia."
Run on sentence.
Overall, your analysis is sound, but you seem to be trying to hard to sound sophisticated, at the expense of the clarity of your work. Make sure you know exactly how to use a word before you use it, and don't worry about making your essay sound interesting. Language analyses aren't supposed to be fun reads, they are supposed to clearly and carefully analyse language. Examiners would much prefer you write a piece using simple vocabulary that is clear and easily understood than a piece where the language isn't controlled, and what you're trying to say isn't completely clear.