I was also impressed by the trailer and it did make Andor appear more epic than I had envisioned.
There were more locations, planets, bases, ships, in that one trailer than in Boba Fett and Obi-Wan combined.
Also, as an old OT fan, the timeframe (stormtroopers, tie-fighters, ect.) hits all the nostalgic feels.
That being said . . . the trailers for Rogue One were all from cut scenes and somewhat misleading. The trailers for TFA and TRoS sequel trilogy films gave me goosebumps and had me holding back tears. So just because the trailer is amazing doesn't mean the show will be any good. Their main objective is to build up hype to get you to purchase a ticket or subscription. The show only needs to be good enough that the general audience will come back for crap.
Here's holding out hope that the show is amazing!