Yes, it would. The 2 hq limit is there because hqs are so capabile of filling multiple rolls and beating down opponents. More than 2 would be pretty unfair in most cases, however, apocalypse has no FOC needs, so you van run 100% hqs there (it'd be interesting to say the least).
Warhammer Fantasy let's you scale up your lords and hero slots (equivalent to hqs) the higher the points level. I wish 40k implemented this as well.
yeah. i wanted to know because some of the Hqs can take a retinue like Captains taking command squads. but the codex stated that it wouldnt count towards my hq limit. does that mean that the extra veterans dont count towards it or the whole unit in general doesnt?
Just when you think you were out... they hit you with a meteor.
Some hq choices don't take FOC slots. I don't know any space marine ones, but CSM have Greater Daemons and IG has a few (enginseer if I recall). Stuff like that is codex specific and I can't speak well to the SMs.