My test bed was definitely at a much smaller scale so the ability of Warthogs to “clog” even Dominators (which typically have good PD) went unnoticed.
Seems less "clog" and more "barely interact with." The PD won't do anything to stop Light Mortar shots, and with 600 range the Warthogs might not be in PD range themselves very often - and with their armor, they're pretty resistant to what hits they do take. Like, an individual Warthog has all the armor and a full half the health of a Vigilance, with only 10s base replacement time.
This is one of the things I've been really looking forward to with the upcoming energy missiles - if you're using missiles as your dedicated armor breakers, the fact that most ships with really high armor also have really good close-in PD is something of a problem. Warthogs are actually a decent answer against that kind of target.
Call it one more vote for "low-tech" style end game fights.