Yea, a Trump blowout isn't going to change anything for the party. They'll still be angry, opposed to immigration, hate the establishment (some might even blame Trump's loss on the establishment sabotaging him), etc. Others will argue Trump loss because he wasn't a real conservative.
There's not going to be a moment where the average GOPers sit back and say "wow, we should pass immigration reform and stop saying ugly shit about minorities or gay people." And by the time the midterms are approaching in 2018 the party will once again be in a lather of anger and prepared to win a bunch of House seats back.