I'd just like to give an update, just in case someone still wonders about X:R.
After a week of intermittent playing, I finished the 3.53 campaign. It only took..25 mods to make the game bearable, otherwise you just get stuck on all the boring minigames, stupid AI, and everything else. X:Rebirth makes me want to hug X3:Albion Prelude and cry.
Mind that I only write this because when I played X2 back when I was 14~16 years old, it really made me go crazy about sandbox games. So to me, X is one of those games that you can get mad at and throw the CD out of your window (goddamn digital distribution!), but that you'll always end going back to.
Even if I was shocked by the terrible designs decision like everyone else, after all that I've read I noticed how much effort the devs put into trying to fix their mistakes.
A LOT of mods have been integrated in the game. I don't think there's a list of integrated mods, but if you check the top mods from older (1.0~3.2) versions, most if not all the best ones got implemented one way or another.
This makes me yell what everybody yelled back when X:R was released: "WHY DIDN'T YOU HEAR US!?"
In any case, it felt really good adding mods little by little. I went to ~30% of the campaign playing full vanilla, then started adding a few mods here and there. Once I was around 60% campaign, I started adding a good amount of them. By 75% I probably had all the best ones already.
So it felt like I was buying software/gaining skills in-game that allowed me to not struggle with so many minigames, that made boarding smarter/better, that shut up all unnecessary chatter, that allowed me to contact shipyards remotely (how the hell isn't that vanilla? That's how it used to be all the way from X2! It used to feel so good buying 10 freighters from the other side of the galaxy!), and so many other things. It didn't feel like cheating - just felt like I was really progressing.
However, I still can't recommend the game, unless you're a real fan of the X universe..and if you are, you probably read a book about it anyway and dropped the game. If you ever insist in playing this, like I did, just follow my advice and do your best to finish the campaign - THEN think about going after your sandbox goals, because:
There's no proper fleet management, AI is insanely stupid to the point that makes CapShips almost useless (unless you use mods), manual trading will make you give up on trading once you have more than 10 ships (due to bad UI), and so on.
Such things make the sandbox part of the game very undesirable, unfortunately.
Again, I really enjoyed the work they put in the campaign. However it ends up being overshadowed by the fact that 30-60% of the time you spent on it will be just flying to the destinations. Unless you use a freighter/capship as a jump ship and babysit it so it doesn't die horribly.
And as always, there were some awkward things later on. Like some battles that were supposed to be epic have very few allied ships (which some were invincible as to make those battles impossible to lose), and an escort mission that will bring you all the nightmares you can possible imagine that involve you autopiloting behind a slow freighter.
Plus, the campaign ends in a very, very awkward way that will make you picture a Producer just telling the developers to "compile, commit and publish the game, RIGHT NOW!". I kinda understood what they were going for with the ending, but it felt like they ALMOST threw all the progress they've made down the drain. It'll basically will make you scratch your head trying to understand if they are going to patch in the rest of the story, or if it's a cliffhanger for a possible X:Rebirth 2...or a DLC..or..something..
All the characters and dialogue were much better and interesting than before. I really enjoyed playing SOMEONE - since in X3:AP it's just weird that you're a random unnamed person after playing with Gardna since X2 - and I don't understand people who "hated" the protagonist. He was just a random dude scavanging around and ended up being forced to play along.
Anyways, maybe in a year or two they'll make X:R actually interesting. All they have to do is integrate some 30 mods and - for the love of god - make NPC chatter skippable and bombard that freaking sidemenu from orbit. Those 2 things together made me die more than anything else in the game.
I just don't understand Egosoft. They always have the greatest concept in mind, but the execution is always incredibly weird/poor.
Conclusion: There's hope, but will take a (long) while.