Moved to Opinion Box.
A problem with the warband choices is that they are limited in number so Tom can't include all the warbands. Considering that Tomb Guardians are amongst the most seldom played warbands I am not sure if it is warranted to give them one of the limited slots. If there are still some free slots available, I guess nothing's wrong with giving it away though.
Also note that Tom is currently super busy so give it some time, please.
Welcome to the forum, by the way!