!Wine, I can't answer your question about mouthfeel, but I can contribute a bit on bottling sweetened meads without stabilizing because I do it too. My recommendation is to leave it at least a year in the carboy after the SG stops changing, and if you're at the end of your yeast's abilities, backsweetening/step feeding can slow down so much at the end that you think you're done if you're measuring weekly but then check a month or two later and the SG's dropped again... so I'd expand the '3 stable identical hydrometer readings' suggestion to be on a scale of months, not weeks. And always have a "control" bottle, best if it's the last one with any sediment, put it in a screw-top or flip-top bottle, and check on it every few weeks for six months.
I've had three batches pop corks on me (thankfully no bottle bombs), and all of them were bottled within a year of pitching, even though things had apparently stabilized, they actually hadn't. I think I had even sulphited but not sorbated one of these three batches.
That said, I've had one batch that fermented dry within a week or three of pitching, and then kept bubbling for 3 years before I finally hit it with some sulphites so I could bottle it and get my carboy back. And I had another batch that would have gone on like that, but I wanted to bottle it so I stabilized it, and the first time didn't take, so I ended up sulphiting it three times and sorbating it twice. So even when you stabilize, you still have to check up on it. Sometimes the yeasties are just really determined...
The chemicals are just tools in your toolbox, it's up to you when to use them or not. Just be aware that bottle bombs are a very real, dangerous threat and if you're gonna insist on being stupid like me, at least be stupid the smart way, with checks and balances.