Well first of use sturdy vest, in smg playthrough was being with 380 hp same con, now ar being superior to smgs, i doubt that, this is max dmg smg, i dont think 16 dex focus smg build outdamages this 1, but yes you lose juggernaut. Nimble and armor slooping, so i can move a little and have some kind of use of stealth and evasion + suppresive fire. And i like throwing to be reliable, only thing missing is 130 biology which i dislike crafting in dc. You have 112 chemistry and 100 biology with workbench, they arent random numbers. Only weakness to this is coil spiders and doppelgangers, everything else... not rly. But i think every build struggles with smth, specially those 2. Wth 3 smg bursts u can knockout 3-4+ ppl in round, without adrenaline, how much can u knockout with ar, dont know never tried ar mid - late game.
Maybe you are right, I'm not 100% sure ARs are still superior than SMGs now but they are obviously powerful. There are burst compensation type (Hornet) and critical-focused type (Chimera), Concentrated Fire is devastating, even a disadvantage can enhance its damage output (I'm talking about accuracy loss when target beyond optimal range). Guns skill is the main damage modifier of all guns, and ARs have higher min & max base damage (same quality), higher optimal range so it's easy to clean a wider cone (you need to do closed quarter burst with SMGs) with a single burst fire (7 or 9 bullets) and you get Gun Rush from whatever got rekt under your caliber.
I've been on a 15+1Dex/10Agi/6Per Versatility SMG playthrough, Blitz is god.
I thought Sniper Rifles shall be back up by SMGs (if you don't use Psi) and ARs also can be back up by SRs. The range and damage type of your main weapon define your combat tactics, e.g. SR firing and AR burst are mutualy exclusive in one turn but you can do burst kill + Gun Rush burst + flashbang + next turn SR aimed shot, don't even need to be in 5 tiles with any foe, strategy may vary. For 15Dex/10Agi SMGer with low Per, Crowd control is the first priority and point blank burst is a must. I have godlike initiative, mollys, flashbang, taser, beartraps, Dirty Kick and even pneumatic incapacitation strike to reduce enemy's evasion to zero (an offset to my shitty guns skill), super speed, and don't need a Sniper Rifle as back up.