I think both things can be true (speaking aside from the current performance issues that one hopes will be fixed soon): hirelings (and summons) do need some more love and improvements, but still are reasonably useful right now if you learn how to employ them efficiently. That's why I created my channel to begin with, to show they can be very useful under the right circumstances. Seeing hirelings and summons tanking a r10 boss while you nuke it down, for example, is pretty fun in my opinion.
It's true that most of the boosts and abilities that make them useful on high reapers, even up to r10s, only come about near or at the cap/endgame, but they're still useful at up to r1 throughout all the level up process, even if just as heal bots and for some occasional utility - and there's really no point in running anything over r1 while solo leveling up anyways.
But there is a learning curve and it takes some effort to learn how to use them, like with any kind of playstyle, really. I just wish there was more support for it on other Destiny trees aside from Primal and Magus, so more types of builds could benefit from using them. Like, for example, giving them a to hit bonus on the melee oriented trees, or even some melee power, like Primal gives them your spellpower when using its mantle. It would be good for SSG financially too, since it would increase the desirability of the perma hires and entice more people to buy the most expensive packs, while still benefiting even people who just use the regular ones.
Cheers!
NH