Probably not.

The primary reason the hanar acted to process the drell was that Katha told them to. He had ‘observed’ the various races remotely and was well aware of the situation on Kahje.

The hanar were perfectly content to let the drell die, otherwise.

Also keep in mind, the hanar were discovered by the drell almost five thousand years ago, before the other races had even developed spaceflight.

The hanar haven’t done much roaming around en masse since the asari took to the stars.

Katha would not, I suspect, have bothered to interfere with the humans. In the current day and age, the technology used to salvage the situation would have been … difficult to keep hidden.

I’m also not sure the situation would have been as analogous. Drell have a natural tendency towards sublimation, reverence of older figures, and mysticism. Humans are independent, stubborn and improvisation.

Evacuation of the humans would have presented other issues, given that the hanar would have had to leave some behind, and they could have managed to hang on to bits of civilization for some time (like the valkhana drell did).

While it is an interesting scenario, it’s not one I really developed. Most of my ‘changes’ are intended to fit between the existing lines of known canon, or to tweak a single value and see where it leads.

Having the humans join the Hanar would require the hanar expending a great deal of time and energy on uplifting them to the proper technological level and conditioning them. Remember, Katha had eons to tinker with the hanar and a good few thousand years to ‘adjust’ drell populations before they had their first interactions with independant alien star empires.

Given what’s in the Mars Archive, once Katha processed it, he probably would have had it removed, then slagged the relay.

But he didn’t indoctrinate the entire civilization. Doing so would have tipped the Reapers off.

He indoctrinated the leaders near him, but for the most part what he did was less mind control and more ‘don’t think about me’.

Reaper indoctrination is the most pitiful bad imitation of Leviathan indoctrination. The Old Ones were dominating hundreds of galaxies for millions of years, and people were happy, inventive, and not slowly brain-farting themselves to death like the Reaper version.

While Reapers can only make you into a retard, Katha can delfect attention, literally make people forget about entire sectors, or alter memories.

The Protheans who worked on the Athame Project and the Mars Archive were disconnected from the military command structure that Katha influenced in any event.