I completely agree, something needs to be changed. I've been in took many guardian battles with other engineers who cast their level 1 heal & my level 6 does nothing. It's hard to stay alive on a 10 point heal every 3 seconds.

Maybe make the recharge rate better at higher levels too, so the level 1 heal can only come in every 20 seconds, for instance then, like revive, the level 6 will be able to cast more frequently. At least this will eliminate the potential of that low level spammer to have a negative impact on the battle.