You are absolutely right. There are enough Sherman variations to fill a bookshelf or three. I’ve built a handful over the years, and plan to build more. BUT, most of them are boxy, green hunks of steel. Which can be, well, tedious after a while. So I get what @mead93 is saying. (BTW, I have a soft spot for British tanks too.)
I have been assuming this is one of the reasons for the over saturation of WWII German hardware in our hobby as of late - they are just so much more interesting to build and paint from a purely aesthetic point of view.
Again, all that said, one can have a lot of good bench time with a Sherman. Do it. Build a Sherman (after the M5A1). I dare you.
I LOVE early war British tanks with their oddball design trying to fill a specific hole. German vehicles are really neat for their constant development.
I will likely build a Sherman again one day but it will likely be a firefly again
I think if you want a generic model it fits the build. The kit can build an A2/A3. Most of the differences is cover by the wading stacks. If accuracy is your main focus, I think Tasca/Dragon kit is more the direction to go. I have 3 or 4 of the Italeri or Tamiya Shermans cause not every project is a detail project and they are typically 1/2 the cost or more.
As Mead says, a lot of small parts and they take longer to build, which puts some modellers off. However, I have built a few Bronco kits and found each to be very enjoyable.
The Locust I did was the British one, which was based on their US version kit, so it needed some work to make it accurate. There is an issue with the kit though - the interior fittings are grossly undersized. I had planned to scratch build a correct interior, but in the end just buttoned it up.