Definitely an improvement over the PL-10, if costly
I've been installing the older Peco PL-10 point motors since the 70s so I'm used to them in their various guises (original, extended pin, low power etc.). I've used them mostly with N gauge trackwork, I found over the years that I got on better using the black slide switches rather than the twin microswitches for adding auxiliary change over switching for frogs and point position indication.
I decided to buy an example of the Twist-Lock motor and microswitch just to be aware of it as an option. I've only had a chance to perform a quick installation test under a Peco TT:120 point, but it does indeed seem to allow for easier marking out and installation using the supplied template.
The microswitch unit for the Twist-Lock seems to cope better than the old microswitch arrangement when used with the limited tiebar throw of small TT & N gauge points.
I'm not sure why Peco haven't bound together the common coil wires to create a 3-wire connection instead of 4-wires to deal with? I can think of no scenario where you'd need to have the coils totally separately powered.
Overall I'd say the Twist-Lock is an improvement over the PL-10, but works out more expensive and as I'm used to working with the old motors I'll probably continue with them when I have several points to motorise.