I’d second Lumberjack’s comments about needing/having both a HC HT and a full suss in the shed. I love both of mine for very different reasons and wouldn’t want to be without either.
I’d keep the full suss though if pressed.
But having said that, if you already have a full suss, then definitely go the HC HT route.
In answer to your question, how harsh is the BFe? It’s harsher than a Soul but nothing like as harsh as say an oversize aluminium equivalent.
The BFe has more stomp and go and you may feel more tired at the end of a longer ride than on a Soul or other equivalent. But if you’ve got 36 Talas forks, while you could conveivable put them on a Soul-esque frame and wind them down to comply with warranty requirements, really they would be more at home on the BFe-esque frame.
Opting for the HC HT would really tick your boxes for improving skill, still being winchable to the top, be perfect for our increasingly groomed trail centres (Scotland excluded) and be a lot of fun.
Dialled Alpine, Cotic BFe, Evil Soverign, Ragley Blue Pig etc all fine choices.