For me, the Enterprise refit was perfection. No matter how cool any updated design, it will always slot in below that in my view. It perfectly walked the line between realism, futurism, functionality, and the submarine in space aesthetic that I love about Star Trek.
Every writer and designer should be told, 'Think submarine in space,' before any ideas go down 'on paper' IMO. Submarines don't do hairpin turns, they don't ignore gravity, density, or atmosphere, they don't ignore the laws of physics (they work withjn the confines of their own fictional laws of physics), and they don't have unlimited stores of energy to perform magical feats at will.
Opinions vary on redesigns. Subject to those things, I am fairly happy to accept them, but would it kill them to do tweaks on Federation ships rather than complete redesigns?