Perhaps another handy alternative(And I'd dare say more useful in quite a few situations) would be having subgroups and some tiering inside those groups.
As in, a 'spellcaster list', a 'melee list', 'ranged list' and so on. And a 'slot-filler list' with those feats that kinda go well with anything(Leadership being probably the strongest).
Heck, it wouldn't even need to be comprehensive, just a few on each list would help lots on build ideas and fleshing builds out too.
If I'm going a melee build I probably wouldn't need a list of over 40 feats(Unless, perhaps, I'm a human fighter 20
).
I think that would help immensely the new-ish people to our world of CO