Latin 35 -> 50
It also remains that barely anyone does Latin to begin with (relatively speaking), rendering your point moot.
Latin is an extreme case that suffers from the same problem as a lot of "small studies" like Ancient Greek, Classics, Environmental Science and Philosophy (albeit to a more annoying degree given the insanity of its scaling). However, I'd argue that when considering the number of schools that offer it, along with the number of schools that actually manage to do well with it (ie. only a handful of ELITE private schools), I don't think it's enough to impact significantly on the system. For any school outside of that handful of elite private schools, getting above 30 in Latin is pretty much unheard of.
Example point: girl who got mostly high 40s/50s for her raw scores got 34 in Latin (and she was considered GOOD at Latin), which went to around 49. The scaling is justified.
To all the people who complain about Chinese, it's probably the hardest LOTE to do well in if you're not in the "political" game of playing around with Chinese schools etc. Again, to illustrate my point that the scaling is generally justified, people getting 50s in English etc. often get high 30s/low 40s in Chinese, and in an extreme case there's a guy I know who got three 50s and a 37 in Chinese. Doing well in Chinese (enough to get the 50+ scaled score) is, again, so hard that the scaling is pretty much justified.
And just for clarification, I realise that there WILL be people who do get put at an advantage by this system (eg. the plethora of people who are incredibly well-versed in any given LOTE, or the elite private schools in Latin...), but the percentage of such individuals is so low that for most of the populous I really can't see it making that much of a difference.