Kudrow's style is a different permutation of comedy than we've seen recently. Kind of a comedic character-actor given main-character billing*. It's interesting to watch her play effectively the same character in two shows-- in Mad About You working off of general-actress-in-a-comedy-role Helen Hunt and standup-comic-playing-mostly-himself Paul Reiser; or in Friends off the rest of the straight-up-sitcom-actor cast. It's interesting how differently the role lands, mostly due to who it is landing upon (how comedic/exaggerated they are, whether she's a foil/obstacle to the protagonists or a friend/member of them, etc.).
*so Bruce Campbell, but without the physical comedy. Or maybe Wallace Shawn's character in The Princess Bride.
All of which is a roundabout way of saying that what she does is highly dependent upon the interplay of her lines with the rest of the cast. It's different from, say, Zoe Saldana in GotG, where her funny lines are funny in isolation (or with the immediate previous line set-up). And I don't think I have enough from this trailer to really form a judgment. Yes, her lines aren't lighting up, but they wouldn't. I'll have to wait until we get at least parts of scenes on Youtube or review shows before I'll be able to get a better bead on whether I like this or not.