Well, one of the theories about who Rey is just got Jossed... at least in one combination. (Pablo Hidalgo is the official SW Lorekeeper for Lucasfilm. Generally speaking if he says something is or is not; it's the official view)
I don't think they built too many Constitution class ships. Any still existing in the 24th Century are probably museum ships. Excelsior class ships could fufill the main ship of the line role/warship role; and for other roles a smaller vessel would be more applicable. Oberth for pure science, the Miranda/Soyuz for more general missions, and Excelsior for more flagship-type duties.
Snoke did superficially look like a Muun (those tall-headed members of the Confederacy); and more importantly while the novel Darth Plagueis is Legends canon... many events and characters from that novel are referenced in the first of the new official canon novel Tarkin.
Could think of the 'resort to lightsabers' as not wanting to go into an hour+ fight with special effects/CGI to show their respective Mastery of the Force, showcasing and possibly explaing how each's master is better. Shonen Anime/Manga go down that route, and it drags out fights for months if not years of RL time. Can't do that in a movie.
Based off the original trillogy; use of the Force was done very understated. You had 1 instance of Force Lightning (multiple applications) when Palpatine tortures Luke; but all other uses of the Force were visually simple. Throwing objects, moving objects, acrobatics, mind reading/control, ESP-like sensing and Force Chokes. I
Prequel trillogy was more of the same, except with more of most of the above. Even in the canon Clone Wars/Rebels, use of the Force stuck to easy to show and not need to explain things. Admittedly, they should have toned down Yoda's kiai'ing (shrieking etc) for the entire Dooku lightsaber fight. It was way too much. Corrected for the Yoda vs Palpatine fight.
You can find it in the upper right of the main viewing pane (not the top bar). Pardon the techincal non-technical explaination of where it is. I could have just said click the linkylink on the doohickey thingimigummy.