Hi Potoroo,
I think the first thing you need to do is check whether the school allows early-access to Methods Units 3 and 4. Some schools allow this, and some don't for various reasons (e.g. timetable blocking design). If your daughter is that keen on doing 3/4 Methods and the school doesn't allow this, you may need to seek alternative options (e.g. through Distance Ed).
Doing all three maths in my opinion is quite redundant as only two can be counted in the top four subjects. Further/General is designed to be an "applied" option (an alternative to pure options such as Methods or Specialist).... meaning students who do Further/General don't necessarily require Maths Methods/Specialist as a prerequisite but still want some form of maths in their VCE (as it's not compulsory past Yr 10).
When I was in Year 10, I was advised to do General not Methods based on my lacklustre performance in Yr 10... for most people, Yr 10 isn't taken seriously. To this day, I regret listening to my Yr 10 maths teacher's advice as not doing Methods impacted my choice of course later on due to uni prerequisites. As a teacher now, I've had to do a lot of things from scratch which probably wouldn't have been necessary had I done methods.
Another point that needs to be made here: the level of difficulty differs from that seen in 7-10 and VCE. If your daughter can do work from the Methods 1&2 textbook (there's a few going around at the moment, the most common ones are Cambridge Senior Maths Methods Units 1 and 2 and Jacaranda Maths Quest 11 Maths Methods), then i'd say give it a shot.
Finally: It needs to be recognised that VCE subjects follow a specific structure as defined in the study design. Teachers have much more flexibility in Years 7 to 10 so you may find that this 'boredom' continues through the next few years.. and really this depends on a lot of things such as subject, teacher, etc. But being in a subject where you find the work too easy and boring definitely warrants the question, at least.
I would definitely be seeking the opinion of her current maths teacher as to future pathways/options and finding out whether 3/4 Methods in Year 11 is an actual possibility at your current school, again, some schools permit this and some don't. It might also be worth your daughter (or you) speaking to one of the current Methods teachers at your school to seek clarity on the commitment required, topics etc.
Good luck
