As far as summoning a shrine once per quest, people already recall for sp and chug pots so it's already happening in all but name. What you call a BAD idea I call a welcome addition. If it's really such a big deal the components could be loot only, instead of purchasable. Problem solved.
The paladin's charging smite variant is to replace the mount which is usually not practical in dungeons, which is exactly what ddo should have done in the first place.
Personally I'm tired of seeing caster's spam the same 4 or 5 spells, adding these iconic and unusual spells to game would bring some life to it rather then everyone casting wall of fire, haste, and finger of death all the time.
I dont recall for sp on principle if group doesnt like it to bad.