Cool story concepts were just thrown out the window, like Goten and Trunks making their appearance in the battle against Frieza only to defuse right away. Super Goku is the more spot on Goku closer to Toriyama's intentions for him as a character, that's just my opinion.
He has also been responsible for my favorite scene in the Future Trunks arc where he came In beating the hell out of Black through their second fight encounter after much more thorough rigorous training that made vegeta excel much more in power than Black's Power himself and putting in contention with that of goku's own level of power.
The real interest i love with frieza during the arc is his interactions with Goku between the 2 that have such a chemistry between the heroism of goku and frieza's darker villainy here that does adds some certain depth of tension which gives off more of a nostalgia vibe between them.
If you look at the best looking episodes, they often have very large talented staffs with great supervisors and storyboard artists, are viewed by Toei as important and hyped up episodes, and have many more weeks of time given to work on them than a lesser episode.
Goku, even in the Japanese dub, matured significantly from the end of Dragon Ball to the end of Z. He has absolutely regressed in character rather than us just seeing who he truly is. Zamasu is immortal, and when combined with the power of Goku Black, is essentially Goku's equal.
I personally hate stuff like this in the writing of these characters if they aren't gonna follow through on what they can contribute to the arc because the movie left the idea open that both these characters would have aged (which is something that the writer should also fix) Not to mention that it would be dangerous for them to be there because Frieza was defeated and killed by saiyans who resemble the two boys, that being of course Goku and Future Trunks.
Love the relationship development from Goku and Vegeta, reminded me of when they were absorbed by Buu. In Dragon Ball Z, when Goku beat the final antagonist, it was a thematic representation of hard work. In-universe, the characters act as though Future Trunks always had blue hair, and some flashbacks have been reanimated to give Trunks blue hair.
He along with his sister Vados can be a little mischievous (mostly vados) but no doubt his calm demeanour as well as his mysterious origin of his species and great power makes him a welcome addition alongside other characters in the show. Zamasu: This was the most traditional Dragon Ball Z arc in the whole show.
Vegeta in the BoG arc allows Goku to attain God Ki and supported him through out the battle which gives off instance of his moment in the Buu arc back in Z of him willing to fuse with goku, Goku His Outburst when he reacts to that Bulma Scene also gives that much valid weight to Vegeta's character as a husband which carries over even in the RoF arc and then even more in the Universe 6 arc with another fellow character and saiyan called Cabbe who is from a different opposite universe to his own which vegeta embraces and the fact that he'd mentor someone and treat him as a brother like other saiyans is not only surprising for his character but is equally progressive.
Just go back and watch the episode 61 of Future Trunks gaining a new transformation when goku and vegeta fail to deal with the villains Goku Black and Zamasu and tell ME they didn't have to do some absolute bullcrap powerup to make Trunks seem relevant to the current scaling right there.