In my opinion although given few lines Diego contributed well. His flow of animations is consistent even if I don't understand lingala. I feel he should get more minutes. What do you think? Is there room for him in WMM?

My view is Diego is nolonger creative. Wacth the repetitions and note lack of new creations.

You are right lack of creativity costs him otherwise he is a good Atalaku

Another notable absentee is Miel... does it mean we will see a group album next year or soon.

possible miel was abroad several times during recording and anyway there were not loads of options for group
miel will surely get two songs on next album if he is still there (hopefully) people say he should leave but  i believe he should remain a bit, he did not make the expected rise to cover heritier's departure since he was often abroad and the group was understandably shaken by heritier 's departure and like all the other groups by the political issues which had got attention of people on music down a bit
so for me now he seems like being eager to make that step up,so he should do maybe one two more albums really cement something strong and then go solo peacefully
as for diego i believe the issue is also his voice, you'll notice than even in his short part there is serious autotune while the real diego was going as high as the old celeo if not higher at times

Miel was given one vocal just like all the other singers.  No singer got more than one vocal.  The reason being this was Werra's  album and he wanted limited participation from singers except for chorus.

In my opinion although given few lines Diego contributed well. His flow of animations is consistent even if I don't understand lingala. I feel he should get more minutes. What do you think? Is there room for him in WMM?

The problem is that Diego is not professional and I don't know why but Wenge always suite him a 90's style while Ambulance, AntiBalles and GOldberg are more modern, the only reason why Werra doesn't kick him it is becuase he has a lot of crowd love and somehow even thouhg he got weed and alcool problems always make a crie per generique when given the opportunity I can understand the reason why you are asking more room for him but I am even telling you the reason why he cannot have more.