Honestly, it should
Azmuth hated the ultimate aliens. They contributed noting to his purposes of making the Omnitrix a tool of interspecies relations, nor were they an actual species that would be need to be catalogued. All they did was help make the Ultimatrix a tool of violence.
In terms of the storyline, probably because they felt like gimmicks. Tell me I was not the only one getting tired of them.
correct. The ultimate forms were part of the ultimatrix core that albedo stole. He then hacked it and created te ultimate evolution feature, so that he could defeat ben. Azmuth didnt like it so he decided to take it away from be after defeating daigon and vilgax. The new omnitrix doesnt have the ultimate feature unless it somehow gets hacked, and since the new omnitrix is hack proof, the ulitmates wont appear.
The new omnitrix is not hack proof.
The ultimate aliens were weapons, while Azmuth preferred a tool of peace.
the ultimate featur was added by albedo for violence and why would the omnitrix take the ultimate alien dna since their original specie dna are already in the omnitrix that would mae no sens if the omnitrix have the original form and the ultimate form
an in my opinion the ultimate feature was a dumb idea its to similar to digimon
is anyone remembering that the new omnitrix was planned out before all of the others .azmuth probaly hadnt thought of the" ultimate idea "until he started the ultimatrix ,and he probaly created it because he knew it wouldnt help ben when the situation got tough.but who it could be added later on a special occasion.
so over all imates should be included