If it was really all up to me, because I had the power of the Q..... oh, this is a good one. I know its not exactly what the topic was asking, but I can't help myself. After all, the premise does including having the power of the Q to alter past continuity. So.....
In chronological order, I am now rewriting the timeline.
-I would have Enterprise continue in the mid 2000s with Season 5-7 and do the Romulan War.
-I would also have let Star Trek Continues get licensed and given a big budget, and let them fill in the rest of the 5YM, then move on to the post TMP 5 year mission, culminating in a massive story involving the Klingons, that leads to the Enterprise' retirement and Kirk getting benched, and a militarization of Star Fleet.
-The next big show, in the early 2010s, would be set post TUC, and be completely wide open. Maybe could cameo Takei, to shut him up.
-Next (but in the 90s), I would completely change the entire structure of the movie Generations (I've talked about it elsewhere, and can elaborate in a future post.) It would end with Kirk in the 24th century, and the ensuing set of movies would have been a combined franchise, with literally any of the show's characters able to meshed and paired and used as needed. Kirk, Spock, Scotty, the TNG crew, the DS9 crew, or the Voyager crew after it returns.
-This concept could have been continued as TV movies or mini-series, with the biggest name combinations getting the theater releases. This would eventually taper off for a few years, until the streaming era.
Time trying to realign itself, we are in the streaming era.
-Discovery comes out, but begins in the late 25th or early 26th century.
-I actually don't mind Lower Decks, and would let that start a post TNG set of stories, possibly with a more serious animated spinoff with Riker on the Titan.
-Picard..... would have been something completely different. Not sure what, but not that.
-Strange New Worlds would be their gift to old school fans, while moving forward with both the animated and live action post TNG series. It would be filmed using the STC sets, but with the current set of actors.