Well, it is a new game and was never intended to be a remake of JA2 (or JA2 with the 1.13 mod either).
Some of the things you mentioned you might find out are misconceptions on your part due to limited playtime so far, but if you are expecting all of JA2 1.13 to be copied you will be disappointed. If you can approach it as a fully new game set in the JA universe then it may be more enjoyable for you. I'd suggest checking out some of the mods (there are 200+ already, even without full modding tools for a couple more weeks). For example there is an Active Pause mod that you might like (for setting up multiple mercs prior to entering turn based combat). I think it's worth playing, even as someone that did love JA1 and JA2. I encourage you to not give up yet, you've only touched 1% of a full playthrough so far. 🙂 I hope you do wind up enjoying it, but if not I wish you the best either way.