What I'm saying is that it doesn't bring anything new to the table. There are already Sentinels in the Tower doing chores. It would be like putting them on the same level as Warlocks, Hunters, and Titans when those three are innately more advanced. There's a difference in having an imagination and just throwing crap at the wall. Engineers took some imagination to find a a fit in the Destiny world too, but they would at least be bringing something new to the table apart from what we already have.