I thought it would have been more fitting for Kirito to remain an amputee. I'd have to try harder, which would only help Asuna fall for him more. It also adds to the relation as being a constant reminder (for the viewer) as to what Kirito was willing to sacrifice for Asuna.

The red intent thing was weird, but what I liked even less was that the dual was set to stop when you hit yellow and not red. It's a large safety margin, but also only lets you fight until you're "bleeding", let's say, and not incapacitated.

I'm still unsure about whether they had sex or not. You can say it's "implied", but Asuna could just be a nude sleeper for all we know.