I gave On1 Raw a whirl this week, inspired 1) by Joel's review and 2) I quite like On1 Photo (sometimes) as a finishing tool
The lack of automatic lens correction is a bit shabby IMO, but the correction tool to fix it works well.
Personally I think we sometimes get a bit obsessive about sharpness... That said, of course for certain usage scenarios (eg ultra prints) it's very, very important.
FWIW I think ON1 is a good product for having a lot of useful features, and has ways of working that should suit most people's experience levels, for example it has pre-sets for a lot of edits, and of course you can still do things manually.
When you compare this to a lot of other apps, which (quite understandably) expect you to know how to use all the tools you want & make your own pre-sets, then I think this is good feature making On1 suitable for beginner and seasoned raw shooters
We've actually had a decent suite of X-Trans editors for quite a while... Sure by most accounts ID has the edge in sharpness (see what I did there?) but also by most accounts, it's only Adobe that haven't measured up against C1/PN/ID/SP/XID/On1
So if you can break with Adobe (assuming Adobe isn't working out for you, it works for many people) then there's plenty of choices out there, all of which have pros and cons.
The 'trick' to find the app that works best for what you shoot, and the way you shoot* and the way you like to edit.
(*for example, Adobe might be the worst for X-Trans demosaicing, but it's possibly the best for post capture exposure push - so if you habitually shoot from a ISOless sensor methodology, then the slightly soft and smeary images are a small price to pay for the extra 2 stops of exp push and the fact that the colour doesn't fall apart if you push it 3 stops, like in some apps)