THQ didn't go out of business because they made CoH have cover mechanics or other innovations in CoH and DoW, they went out of business because they shifted out of primarily making children's licensed games for Disney and others without having a new revenue stream ready to go as a replacement. They then threw themselves into making more adult games which only the Saints Row and Relic games ever paid off for them. They also invested a lot in a WH40K MMO that never launched. Not launching an MMO isn't cheap.
The hired a lot of very high profile game creators and movie directors to make video games that were never completed (at least under THQ). Paying Guillermo del Toro to not make a game isn't cheap.
Relic made some excellent games under THQ but again when I was there they (THQ) fundamentally wanted to be in the business of big AAA console blockbusters.
Under SEGA Relic has a publisher that understands PC gaming better than THQ did at the end and understand the strategy market. Whether you like CoH2 (the only game Relic's released so far under SEGA) is a matter of personal taste. However I would argue that Relic is better off with SEGA than the THQ I worked under.
Edit:
Here's some links to read if you're wanting supporting information. Also I totally forgot the UDraw which was a successful drawing tablet for the Nintendo Wii which was then a not successful drawing tablet for every other platform.
- http://www.vg247.com/2014/03/17/what-really-happened-to-thqs-unfinished-games/
- https://gamerant.com/insane-cancelled-del-toro-thq/undefined
- http://www.eurogamer.net/articles/2012-07-04-devils-third-rights-returned-to-itagaki-and-valhalla-game-studios
Thanks for your insight Noun!