Yeah it was kind of a mess by the end of 3.5e when they began to patch the hole.
Things like the book of nine swords was too little too late, and all those books letting melees have special moves.
Earlier books relied on feats alone and thus too few even for the fighters.
4e felt like a try to put some order, have yet to see how 5e deals with that.
Still believe balance was always in the DMs hands, tied as they were, thus power creep was one easy door out.
Persistent spell however, i believe won't work with haste.
It need have personal and fixed range, and give detect doors and comprehend languages as examples.
Haste has close range (25 ft/lv so not fixed).
I gather this was one of the balancing factors of the feat.
I think it was reprinted for 3.5e in the CA, maybe the earlier version didn't had that requisite.
For full aura it'd take the epic feat permament emanation, that one just needs it be an emanation.
(haste isn't an emanation either)
Persistent won't be too useless tho, the point of fixed range spells is the same as in the permanency spell.
A convenience for high level casters that need not bother with such minor spells like infravision, read magic, etc.