I didn't dislike the original Iruma but this guy seems to be a million times better and has no downsides other than being a bit of a prick to the principal.
I'd be okay if Iruma remained like this for the rest of the series, even though I know it won't happen.
i just realized something, from the moment the series started to now was for one thing- ambition. i mean yeah they spelled it out just a few chapters ago but everything from gramps gaining iruma to him making friends was so that he could gain confidence and gain a goal.