If the authors of the mods for X Rebirth thought the same way, the game would have suffered the same fate as the seventh installment.

But it didn't, did it?
I can't know the exact number of people playing it; I don't have that information. But, I enter "X rebirth" into Google, and I see 5,800,000 results. I enter "heroes vii," and I see 12,000,000. Heroes 7 -- 19,500,000. Might and magic heroes 7 -- 4,200,000.
Popular Heroes 3 -- 28,000,000 results.
Heroes 4 -- 25 million.
Heroes 5 -- 247 million. Again, two hundred and forty-seven million.
Although heroes 6 gives 208 million, to be fair. Well, you can attribute that to the residual effect of the popularity of previous installments.

Simply put, however you measure the success of a game, I doubt that X rebirth is successful. I'm not saying it's good or bad; that's subjective, but I doubt its popularity. Am I wrong?