Actually I didn't like the clip much. Too much of it was exactly like a certain 1977 movie, particularly the constant direct quotes in the music. I would've liked it if The Clone Wars had used more of Williams's themes, but this much direct imitation of old cues, especially in concert with direct imitation of the shots they accompanied, is taking it too far in the other direction. I hope the whole score isn't so imitative.
And I didn't find the scene very funny, and the droid still annoys me, especially the voice, which sounds like somebody going "wah-wah-wah" through a ring modulator. At least R2's bleeps are complicated enough to believe there's a real language there. Chopper's sounds are about as complex as Morse code, and I can't believe they could convey that much in the way of linguistic information. Plus they're just irritating. Although I did kind of like the bit where the droid took matters into its own hands to deal with the last fighter.
Actually I have to agree with a lot of comments I've seen that it sounds more like he's muttering "fuck-fuck-fuck-fuck" the entire time.

As yeah it's still obviously copying moments and scenes from ANH, but I suspect this is just Kinberg and Filoni's way of reintroducing people to the style and tone of those original movies again. I seriously doubt we're going to see this kind of thing throughout the entire show (and besides, there's only six hours worth of that material to borrow from anyway).
The music though I definitely don't mind hearing again. It's great, exciting stuff that still works just as well as it ever did. And if they're going to copy the scene, might as well do it all the way I say.