LOL. Well there are 60 Acolyte entries vs. only 24 Harrier entries. Of the Acolyte entries, there are 2 first place PC entries and 6 first place console entries. Of the Harrier entries there are 0 first place PC entries and 4 first place console entries.
It really doesn't matter, lol, I provide to you a line of reasoning based upon the most quantitative metrics I have at my disposal, and they are discounted by way of opinion. Specifically by an opinion that trivializing the difficulty of a multiplayer game by yourself is not indicative of relative imbalance!
Whatevs.... I need to get a life and stop checking BSN.
Since I frequent the speedrun thread, I'll comment purely based on the stats.
Based on the speecrun thread times, you conclude acolyte leads to faster times than harrier. This is true as an overall metric - no questions. Most of the fastest times are on glacier - so the map is identical in both places. But there are two things you forgot to consider - enemy and character.
Let me give you an example - fury has the fastest entry using an acolyte but TGI doesn't have the fastest using harrier. You are comparing two different characters here - characters that play very differently. TGI with an acolyte will NEVER give you a time even close to harrier or a whole bunch of weapons. Fury with a non-acolyte (say, harrier) might actually get you close to 18:xx or so, while TGI will have a real hard time hitting sub-20 with acolyte alone. So, comparing the stats across diff. characters is not a very good idea.
Now, let's consider the enemy faction. The most dominant faction there is Cerberus, quite understandably. Phantoms are generally the most productive enemy type in Cerberus and high RoF, low damage weapons (harrier) are generally inferior to low RoF, high damage ones (talon, arc pistol). Again, not a very fair comparison, don't you think?
Solos are a decent metric to discuss stuff but you need to normalize everything to the same setting. None of the other three factions have the same DR BS that phantoms have. So, cerberus solos using two weapons that behave differently is not a great idea.
Consider the volus engineer. There are two PC solos vs. Geth - one with harrier and the other with acolyte/CSMG combo. The former was done on White, which is generally a 'slower' map than Glacier, which had the latter solo.The harrier solo was quicker. Yes, player skill matters (let's ignore that for a while) too but this comparison forms a better ground than the entire thread as such.
FYI: I quite like the acolyte and think it's not really OP but that was not the reason behind this post. I just wanted to point out a couple of things you may be missing.