Ah no just because minato is alive dosen't automatically mean naruto will become a genius he would still be the dumbass he is.
He would be a strong ninja because of sage mode, mass shadow clones,rasengan,rasenshuriken e.t.c, but theys no way naruto is smart enough to learn FTG and sealing techniques
I'm going to have disagree with you here. As we all know, Naruto isn't the brightest character, and this is largely because of how he was brought up. Because of Kurama, nearly every adult in the village distrusted Naruto and as a result, Naruto distrusted almost every adult. When it comes to learning new things, results will be much more successful when taught by someone you trust as opposed to the opposite.
The same logic is applied for mannerisms and personalities. We are all heavily affected while growing up by the adults around us. If Naruto never became Kurama's host, then his parents would still be alive; it's likely his manners would be better if instilled by his mother, and he would more than likely have inherited the calm and collected personality from Minato.
In conclusion, you can't be certain that Naruto would be the same as he is now if things were different. (That being said, I can't be certain he would end up any different, I just believe it would be a lot more likely).
On topic: Naruto would likely be as powerful as he is now, trading Kurama for space/time techs and FTG.
-Peace