Actually, I find it quite overpowered in every gametype. I can go on spree's with that relic like no other relic. You just need to adjust your style to the relic you're carrying. As I stated in testing, the Regen with slower rate was already the most powerful relic in the game.
Again it really depends on the gametype. Relics and Duel dont mix well. But for DM game types for example, I find other relics are easier for me to own a map with. Give me the Strength and the ERDW then watch out

Just ask genman1{HHR} as he was feed many a relic damage enhanced rail bolt last night
But this helps to emphsis both our points. Different relics will make you adjust your game. You can do better with the Regen, I do better with the Strenth the way it is. I am sure others will find a way to do just as good as we can with these relics with ohters.
(oh..., and, there's not always gonna be health packs handy to grapple to..., and these weps/physics/damage/wholegame are dif than UT99)
Well it depends on the map, Most indoor maps have health packs near enough..or packs I can get to with in a 10 seconds of grappling. Out door maps its a different story agreed. Thus the map itself is. And your correct about the games being different. But they also share many of the same things like the core physic code is more or less the same (karma of course is different but that does not effect gameplay). The other thing to factor in is UT99 game play is slower.
I gues my point was there is enough varity to make it impossible to balance everything. You have a wide varity of maps, a wide varity of playing styles, a wide varity of games, ect...
BTW anyone tried the Hoverboard yet?
What about the RTS?