The thing is, it brings up all those visual and narrative cues so that it can play with your expectations of how they turn out.
So you see the Emperor's cool-looking, red-clad bodyguards actually getting to fight instead of just standing there and looking imposing. The Emperor gets killed by his apprentice, but not because his apprentice seeks last-minute redemption, and the Emperor's death changes nothing rather than resulting in instant victory. The AT-ATs show up and the rebels have to get on old speeders to go fight them, but the sally fails, the AT-ATs are completely unharmed, and most of the speeder pilots die for no reason. Puppet Yoda shows up and surprises Luke with a lecture on the positive aspects of failure, a bit of a contrast to his earlier "do or do not, there is no try." Rey visits a place strong in the Dark Side, but rather than getting some grand and terrible revelation like Luke did in Empire, she simply sees her reflection. She tries to redeem Kylo Ren, but he decides to stick with being evil. The rag-tag team of misfits infiltrate the enemy base, but fail, get caught, and make the situation much worse. The Millennium Falcon comes in and shoots up some TIE fighters, but that achieves basically nothing overall - the Resistance guys are still basically doomed when the laser-ram fires - and the eventual rescue later on would've been impossible if the survivors inside hadn't decided to try and escape on their own. And Luke dies, but not passively like Yoda did - he dies after taking action, re-living Obi-Wan's last stand in an unexpected way. (Seriously, in the lead-up to that my friend was like "ugh, they're doing Obi-Wan," and then when they didn't, he went "oh.")
The Leia recording and C-3PO, I got nothing. I don't know why C-3PO is in this movie. But Luke does call out R2-D2 for shameless exploiting his nostalgia. Overall, the film was working very hard to screw around with all your expectations as to how the film was going to turn out, and it largely succeeded.
It succeeded a little too much in my mind, because while having the characters waste a whole bunch of the audience's time on a casino planet for no reward may be very effective at deconstructing the success rate of the average just-crazy-enough-to-work plan, it does still waste a lot of the audience's time.