What templars have is not a self heal at all. In PvP it is highly unrealiable as the chance of there being someone with even lower health within 30m is quite high. Also, the heal is quite expensive for anyone not in full light armor, so spamming it is not an option for most pvp-geared templars.

Besides, I think your view is too narrow.

Sorcerers can also streak away.
NBs can use their cloak, get bonuses for attacking from stealth, have siphoning skills to get hp back etc.
DKs also have a lot more abilities that are powerful and useful, chains, standard, etc.

Templars heal is not a self heal. It will target anyone near instead which happens a lot unless timed right. You are also trying to balance just two things in terms of each other when there are many other factors to take into account.

Kaliki is still right though, as BoL is unreliable no matter the armor and puncturing sweeps is easily evaded or blocked or negated, and healing ritual too long to cast safely in a fight.

A Templar is not as dangerous as you think, and iirc, don't the other classes also get some lovely toys to play with as well? And dragonknights have a semi execute now through igneous weapons don't they?

I mean correct me if I'm wrong, please do, but this is not as black and white as you think it is.

Heck if you want to talk about balance, the sorcerer and the NB are actually the UP classes BECAUSE of their lack of a quick self heal:/ NB siphoning attacks don't heal for very much, and sorcerers have to score critical hits with critical surge, which is heavily negated by impenetrable trait armor.

I feel that I should mention that I fully support Sorc's Surge being changed and Nightblades getting a more potent/real self heal.