I'd love to give you video footage...
It is clear why you rarely see lasers in PvP, they need too much time for dealing damage,
if you check youtube for current PvP you see the following used:
Railgun
Fragment cannon
Torpedo
maybe Plasma Acc.
So what are these?
Heavy hitters, apparently you need artillery sized gunz to circumvent the meta-maximum HP/dmg builds.
What do those have as utility? Maximum heatsinks....
That is PvP in short, have big iron-rear and big gunz.
Is that fun?
Not to me.
I see your point in theory. World of Warcraft was the same for me; early PvP was pretty fast-paced and exciting. Then people with later expansion packs hit points got inflated, new PvP-damage reducing stats were added, and it became a thing where you had to gear yourself out a specifically to PvP, and it was a dull drawn-out slugfest. Boring.
I do like that high-damage weapons exist in the game, and naturally those are the ones that PvPers will choose. I think, in theory at least, the niche of lasers as "lower burst, but infinitely sustainable" is a good one to have. Both of these two need to mesh though, to a point where rails and frags and the like can still be clearly better in an encounter, but lasers are not pointless.
Part of this I think could be tied in to what I was saying previously about hull mass and engines; where a ship that was beefed up with big shields, boosters, HRP's, big guns, and the big power plants to run it all, took a performance hit from it. It would make finding that balance a bit easier by adding in more natural give-and-take at all aspects of the game.