Well.. the ending may be a little lacking for action but what a back door way to open up more Thrawn!
the ending scene shows an arrival at a place that could be little else then Mt Tantiss-from Heir to Empire books. so far, a non canon site.
if it is revealed as Tantiss, and it is said to be used for the same ways as the empire and Thrawn used it, then it looks as if the events of Mandalorian with what we see the Imp remnant in t hat show doing ARE elements of The Thrawn Imperial Remnant -the one in the non canon books
if this happens, then it would be a direct threat to Palpatine's First Order, which had its first canon, organization in the un k regions, after the battle of Jakku. or a few yrs before the events of Mandalorian. bad Batch could show the origins of this Thrawn organization
Thrawn has been shown to have no real opinion of the Force or its users. Some theories state that perhaps his race, the CHiss, are above the effects of the Force and maybe why both the Sith and the Jedi never expanded into Chiss space out of fear that they could have no sway over them--which also may explain, if truE, how Thrawn breaks Ezra's hold on him.
Also, the human greeting Nala Se is a human dressed the same as Dr Pershing
i like the way Filoni and crew are spreading out the big story in snippets across the timeline and diff shows and characters. instead of packing it all into one show or trilogy of films, we get a layered, before, during and after telling of a (hopefully) big picture story with his shows together with the films --if there just wasn't so much filler episodes in between..