Sure, a fail rate is fine, but I'm not talking just about the i70 desynths (100% at 100, 92.5% at 95). It's also a huge deal with the i95 Allagan Weapon desynths (BSM is my low class right now, and at 95, the chance of desynthing an i95 item is 50%. Much worse than the 60% at 100). When we are allowed to desynth i100 items, it'll get even worse - 40% instead of 50%. And so on. 10% makes a huge difference at the extremes, not to mention that 92.5% fails quite often, irritatingly, when 100% never fails.

What I expect to happen is that they will eventually raise the cap to 400 (with 3.0), but when they do, they raise each individual skill's cap to 150. So, you can still only max two skills. I don't expect the raising of the cap to be helpful for people who want to have more than two classes at max. I'm also guessing this is why they don't really care about 300 being really awkward - it's just how things work out with the current values, but it'll be totally different when they raise the skill caps.