Obviously everyone has 99999999 favor points.  Obviously only about 5 favor items are ever used.

Not that I expect any changes, but maybe a mod will address this one day.

1) Is there anything we can think of that favor points could be spent on?  I wonder if something like 2000 favor points to buy tower regen 1 would be a possibility.  Something where it cost a huge amount, gave a little buff, so after an initial spending spree, people would have to start conserving their points.  Doesn't have to be regen, could be a 750hp potion, or a sludge slinger.  Anything really.  Another level of tactical resource complexity that would add some flavor to the game.

2) Favor items in general.  The ones that are polar in that all their points are toward one, useful effect.

BotF: 800 hp.

Anklet: 15% speed.

Etc.

The OTHER favor items are in the middle of the spectrum.  +200 hp, +5% attack, etc.  Things that may add up in the long run, but don't help in the initial, crucial engagements.

Revamping the useless, unused items would be interesting.  Probably not possible, but maybe one where all friendly creeps in the area will attack the DGs target (focus fire).  Or all creeps ignore the DG.  Or towers do 50% dmg to the DG.  Or has an 5 second aura that prevents healing potions/sigils/etc.  All magic dmg reduced by X%.  Enemy minions of targetted DG are slowed.  Stuff that has a concrete change within the game.

Stuff that would be directly useful, and would add more levels of complexity to the fights.  The players will eventually figure out what is most efficient.  It'd be great if the items were adapted to the metagame.

3) Barring #1, that favor items had a system where they were a finite resource.  Maybe they reset every 72 hours.  Or items don't stay "bought", you have to rebuy them every round. 

Just some thoughts.  I like the favor item concept, but it'd be interesting to push it to another level one day.  Assuming DG just doesn't belly up and everyone quits playing it.