It took Astralis around 6 months to integrate him into their system but since the social dynamic seemingly is working out well they were able to return to an even higher level than before the roster change.
The same could be the case with Pajkatt but I think it is way too early to accurately judge it as a viewer at least. I think he played better with last season Optic than he had in a long time and that might be credited to the "system" of the team, the role of the captain (and potentially a coach) etc.
But perhaps I am just missing the obvious clinging to hope instead.
I also think that the notion of "winning TI because you are lucky" is a weird one. I completely agree that luck plays a factor but I think the pace with which the team learned and grew explains a fair bit more.