Primaris can be dope but there are two huge factors holding them back which will hopefully be dealt with in 11th:
>Too much uniformity in their armor marks, we're already seeing this be dealt with in the new SW/DW kits plus this motherfucker
>Weird-ass weapon segregation per unit. Aggressors and inceptors are the only units I can name off the top of my head with alternate loadouts on the entire squad.