Okay, so whilst I was on IRC the other day talking about the UAV stuff - specifically transferring TUs to the UAV - I was wondering about the following thing:
BattleItem class has a "WoundUp" value (not to be confused with "wound" as in injury, stupid English)
A "Special Ability" is added to the item saying it supports winding
When clicking the item in the hand, you have the usual items (Launch/Fire/Throw/etc.), but you also have "Wind Up" or something similar
The WindUp action would update the WoundUp value - and can be done over multiple turns etc.
Then per-item, you use the Wound value somehow-
ie, for Grenades it could be blast radius or damage, for the UAV it would be TUs allowed
It's a bit of a crazy idea, and doesn't really have any use in XCOM as-is, but thought it might be useful in mods