No, my approach is: as long as there are ships that can do the job you're looking for, you don't need to unnecessarily change ships just because you like them better than others, instead you should go and get the already existing ships and do that job with them.
Rather different methinks.
I'm not quite sure given that you said the Ambassador should be scrapped because...well you didn't even say because you think she's unattractive but because she's unattractive like it's the absolute truth because you think she is.
And we don't even know yet what her job is yet.
So since you say the only determining factor in your thinking is a ship's function (while also saying she should be scapped because of her looks)...how does that work?
Besides, I don't even want to fly the Galaxy-R.
I am very satisfied with my Star Cruiser, which does the job I chose it for quite well: soak up damage like a sponge.
However I don't really see the point in the inclusion of ships that are basically useless.
It's a waste on several levels, including effort on Cryptic's part to introduce them.
So if each ship has its own nice (however small it may be) where it's actually useful Cryptic should end up with a more ven distribution of revenue so it should be in their onw interest to make them not s**k like the Galaxy-R does.
Until we get something useful for Ensign Engineer **** it and make it Tac or Uni.
I don't know about that, with a Dragon style EPtS and EPtW chain or an AtB build you run out of space fast. The ensign engineer gives you room to run ET or A2SIF, RSP, and a support power like EWP or Extend Shields. Without it you can't have them all, and have to sacrifice either tanking or support. Of course, you do get the LtC Sci slot, which can help with that, but I still wouldn't consider the ensign engineer useless.
Science mirror of the Excelsior would be quite cool, although a 3pack of 'bassies might be interesting, I think a fleet version would be more likely, unless we got some more 2409 style skins to put on it. Less work for Cryptic, and there are only so many console and boff set ups that could work.
That said, making a cruiser mirror of the Nebula could also make sense for the C-store one: