Don't worry about bringing a Troggboss unless you're running a lot of Troggoths. He's actually a very different unit to what is usually assumed, in that he's not just another ballistic missile monster, he's a super-heavy foot hero who's supposed to hold your own line and keep the rest of your army together, by virtue of being a tough Hero and a decent fighter. If you can keep him around until turn 3+, you'll find he comes into his own when every other unit on the board is wounded, where he can clean up at full efficiency. He's easy to keep safe with Look Out Sir, Cover and his 4+ spell save, so just make sure he's screened from melee.
In the prevailing meta, small Heroes get removed extremely fast, and Gitz rely a lot on small heroes, so having someone who can take a hit in your core army is valuable, even as an Inspiring Presence platform. At the end of the day, he is our toughest Hero outside of stacking -1 to hit on an Arachnarok. But if you want to use him, the army needs to be built around him. I'm certain Glogg's Megamob will elevate him significantly from Ok to Good.
It's difficult to pinpoint exactly how the meta shapes up due to the lack of games happening, but Gitz do have a few tools to deal with shooting.