Yeah, I don't know what you're talking about. You mentioned that he still has the same dojutsu after the time skip, I meantioned that Sasuke still had the same dojutsu after the time skip.
There's a difference between what you're saying and what Indra is saying. Here's the point that Indra is getting at:
Boruto vs Kawaki was depicted as being most likely the climax of the story, and a point at which Boruto will have fully mastered all of his current and future powers. Having said that, the fact that Boruto's eye is the same during the fight against Kawaki as it is now lends more credibility to the notion that Boruto's dojutsu is actually something strong and unique (since the main character is generally pretty strong by the time of the climax).
Now here's the difference between the time skip that he's referencing and the time skip that you're referencing:
He is referencing what is most likely the climactic final battle, where as you are referencing a simple 3 year time skip that just marked the beginning of part 2. Naturally, neither Naruto nor Sasuke would be at their final full power at the beginning of part 2. Therefore, you pointing out that Sasuke was still just at 3T at the beginning of part 2 is incomparable to Boruto's eye being as it is during the climax.
You would have more of a point if Sasuke were shown to be only at 3T during VOTE 2 and then still went on to awaken rinnegan later. However, early part 2 Sasuke isn't comparable to climax Boruto.
Also, it wouldn't make much sense for it to just evolve into normal byakugan. For one, Himawari awakened a dual set of normal byakugan at the age of 3 without such an arduous process. Why would Boruto awaken it in only one eye, or have to go through such a progression? Why would a normal byakugan respond so heavily to the nue (and thus far, only the nue and Sumire)? Since when does a normal byakugan see through dimensions or emit lightning? Lastly, how would a normal byakugan be special enough to give Boruto a main character type power level?