Why would it fail? Controller support is good by all reports console sides. Issue is with Switch version quality, not controls per say and PS4/5/Xbox ports seem fine.lol, if the existing games don't get updated with controller support, I hope this whole thing fails like PoE :|
Games already sold what they are going to sell on PC in any case. Would it be good to get updates on PC? Sure! Would it really move the needle for sales? Nah. If people refused to buy these excellent titles on Steam/GoG before, they aren't going to buy them with controller support.
What they do need is refresh of Dragonfall iOS and Android port as well as HK release. Oh, and add the controller support on these! ;)