personally I play solo.
having a mercenary in the next expansion is good news.
however, I only find the need for a mercenary in dungeons, boss zones and Group Delve.
it will be best to start creating more content for 2 player.
I know that designing dungeons for 4 takes more time.
I suggest adding Group Delves (for 2 or 3) like those that already exist in Craglorn.
they are less complex in design.
there is also the possibility of having a Group Delve version for all delves of the game too.
I know that this content is easy for a lot of people but, it will be good if we have some content to appreciate a lot more the presence of a mercenary by our side.
It will be ideal to have 5 or 6 new Group Delve with the publication of each of the 4 patches of the year.