Sure it's a playstyle. It's just not balanced at all, like plenty other things.
If, for example, you needed a Leader perk for every companion (I, II, III)
and CH to get them, these builds would be much weaker solo.
I hope this isn't going to be a no-can-touch subject like pancors were
and we are at least allowed to discuss how to possibly fix this issue.
It's not like I'm whining though, since I don't really play much anymore.
I've been online for maybe 2 hours in the last 2-3 weeks.