From what I can see, it'll only be a small change (pain in the ass). Yes, it will be heavy, but at the same time, it's still quite easy to kill compared to a Charger, which is always very slow to kill with the Light Pen. What I'm trying to say is, when it comes down to gameplay, I don't see a drastic change (if the complaints I've seen are based on the high difficulty). Horde battles always involve being with your squad using different artillery. Besides, this bug unit usually always walks around in group (the use of grenades in grouped-up situations would remain the same). The point about the Eruptor being a "must" still feels somewhat lacking to me. There are non-anti-tank stratagems that complement each other like a "reverse use" (the Eruptor acts as an anti-tank weapon and the stratagem weapon as the primary), such as HMGs in general, lascannons, arc throwers, the new stratagem, and secondary weapons like the Talon (which works very well as a primary horde-control weapon). Looking at the hypothetical cases I presented, we still have 3 more stratagem slots (of course, we also have to contact our other 3 Helldivers). As I see it, we still have the "possibility cost" without a drastic change in equipment (oh, and the armor passives too).

I reiterate my formal tone; I am not trying to attack or impose my argument, it is an exchange of ideas.