The reason I like 1st level for proficiences/training/ribbons and the crunchy stuff at 2nd rather than 3rd is that all the full-casters get a decent power buff at level 3 with extra higher spell slots as well a huge assortment of new 2nd level spells. Full casters have plenty to do at level 3 without adding another boost there. If we moved to a 1/2/6/10/14 scheme for all subclasses, martial would obviously have to get a power spike at level 3 to compensate, but that could be done by rearranging the current features or adding a new feature since martials need a buff anyway. Half-casters probably don't need as much of a buff because they gain an extra spell-slot and spell, but the half-casters don't need as much as a buff as something like the Monk, 1D&D Playtest Rogue and even the Fighter and Barbarian, so half-casters could probably benefit from simply reshuffling where features are on the class list.