I've been looking at stuff because I'm still using AfterShotPro v1 (v2 and v3 went downhill fast). Never used LR, tried it again recently and I just.....do....not....like.....it.
The thing about ASP is (well, was) super fast to make local selections without a brush, which I do a lot. However, noise reduction, sharpening and other processing have moved on since 2013 and while adequate, it is not stellar. (The new Corel ASP is complete garbage - stay away). And if I ever have to replace my 5 yo computer and move to W10 I'm stuffed.
Recently looked an ON1 and CaptureOne.
After spending about 20 or so hours with C1, I'm pretty sure I am going to go that route and upgrade from ASP v1, despite the steep price. Of course there are a few things I'm not too excited about, but it has enough for me to make selections easily and is customizable enough for me to be quick using it. I like it quite a lot actually. Not sure how LR masks are stored, but compared to ASP it is going to take up a lot more disk space. Still, that shouldn't be too much of a problem, I might just have to change the way I store files and take advantage of C1's offline processing capability for older shoots (i.e. keep the last few months images locally instead of the last 10-12 months). And the images start off looking more similar to ASP than anything else. I will still use CS6 for a lot of detailed landscape photo work, so I don't need detailed blending, HDR etc...
On1 - might be good for some, but any software that doesn't have a curves tool that you can make finely tuned adjustment on right up front is a no-go. Anything where it is easier to apply a 'Hipster' preset than a curves adjustment in not good IMO. Masking is nice, but when do I ever replace a sky? Never. And for any other blending the smart brush is not so hot. Better for folks who want the basic adjustments in sliders and a lot of presets - seems strange that they added advanced masking to this front-end.
I might try Lumina, but is looks very LR-y on first glance and Macphun have been messing people about with their releases.