Windows 8.1 is dead. It's a tainted brand that Microsoft can't run away from fastest enough. The best you could hope for is that Windows 10 adopts more of the features you liked in Win 8.1.
It's true that 8/8.1 were uncomfortable to the majority of users stuck in the non-touch *desktop* world. However, any of the "Start Menu" solutions fixed 98% of that issue and you could nearly never see the Start Screen. Windows 10 appears to be no more effective in that regard but you can get "Start 10" to get your Windows 7 menus back if that's what you want. Still, other differences make W10 a larger departure if pure consistency is what you're after.
In the touch world W10 has a long way to go yet which makes it a bad choice for Surface users and other Windows tablet users that use them as tablets. Again if you run in desktop mode with keyboard/trackpad/mouse attached or the device docked you'll do alright with adjustments.
There's no question from a total numbers perspective with regard to installed Windows systems that Windows tablets are a drop in the bucket so it makes sense that W10 started where it did, focusing on the *Desktop*. It's just too incomplete. Maybe the November update will fix that but I doubt it, more likely it will take W10.10 (Redstone IIRC) late next year to bring it up to snuff. We'll see.
Even the touch interface of 8.1 as a "second effort" is unrefined. However, in no way does W10 at this point represent a refinement of touch over 8.1. At best Id call it a reboot of Touch and half-assed unfinished mess deserving of a release level less than 1.0.
Agreed that 8/8.1 was much maligned publicly and suffers from a largely undeserved bad reputation. One analyst after nine months declared an epiphany and recanted his panning of Win 8 calling it quite good for tablet use. Most never took the time.
If it's possible I will install 8.1 on SP4 assuming Touch remains in the expected state until Q3-Q4 2016.
Side note: If I wanted an Android Tablet, which is heavily parroted by W10, I'd use the one I already have or just buy a new one.