I really don't mind lurkers that much. Good lurkers are still deadly (and I agree - they're better than a ravager by a longshot; don't get prioritized, similar damage potential, smaller, faster, stealthier, and almost as tanky or maybe even tankier), but you can generally deal with lurkers so long as you have some decent marines sticking together.

The worst xeno offenders right now are honestly spitters, sentinels, and warriors, with spitters and sentinels leading the pack by a longshot thanks to neurospit.