Does the new installer have a check function for his files like the old one did? I did not see one.
If you mean the integrity check then yes, but only for games divided into few .bin files.
And I think it is a bit stupid that the new one does not support periods in the path as the old one had them.
Actually it depends - there are games that can't handle commas in install paths.
BTW I'm still waiting for people to notice few little but useful things added to the installer by popular demand :-P