Error 1: "Full-Share Cannot Avoid Reality of Math"
There is no math
Error 2: "People like it because of the "lanes" it provides. It can also be stale, like any other map done over and over. It is not inherently bad or good, just a scenario where "lanes" don't interact with each other until a surprise attack comes. No surprise therefore that this map became breeding ground for fullshare."
Senton is not a lane map, lane maps don't exist aside from misunderstandings of how teamgames actually work. Any high level senton game is ultimately decided by questions of mass concentrations, in particularly competitive (read: tournament) games this can be seen by players optimizing gameplay around extreme air heavy gameplay, walking 2 acus mid, and massive land spam including early bombers/labs from the front player. Fighting over the mid reclaim becomes equivalent to fighting over the central 4 squares in chess and every piece coordinates to make sure you express control there and later jump from that to control elsewhere.
Error 3: " It was obvious the best strategy would be to collect as much mass from the shipwrecks as you could, upgrade your Mexes to T2, then suicide your comm in the best way possible."
Your idea of the optimal strategy does not play out in any high level senton game. You can go ask Yudi, Nexus, Farm, Foley, or any other flavor of top player about how easy it is to micro 4 bases against 4 players, even if those 4 players are actually a deviation worse than you in skill. Either you are wrong or you believe you have better game sense than all top 50 of FAF. Which is it?
Error 4: "This is proven as a good strategy for Full Share Setons, as everyone will yell at you if you kill the enemy mid comm early."
Nobody yells at you for killing a mid player early in (high level) Sentons. In fact one of the greatest copium memes is "I have nice eco" after dying early and now your team needs to delay their scale in order to make sure the game isn't completely over. Mid player can abuse this by going hard eco if enemy overinvested into defenses. Mid player can get ACU upgrades and push directly in with a late t2-early t3 force. Mid player can get TML and cancer bases. Mid player can get t2 air and drop tons of his units he made past the mid base and cancer mexes. And so on.
Error 5: "What is fun, is the parallel to real life. Scouting. Finding a weakness. Exploiting it. Flanking the enemy. Defense in Depth vs Deep Battle. FAF brings to the table what only some of the best military simulators manage to do, while being a RTS. The key being that the goal is singular, and that is to kill the enemy COM. This allows for those brilliant plays, those epic moments. The comeback potential."
You didn't address any of the gameplay elements I wrote about in my pdf you were talking about. The point of No share is that there is no "epic gamer tactics" because killing an ACU carries an inherent 40k mass loss for the enemy team if you succeed. It is basically impossible to imagine a mass investment in a snipe that is not worth it in any 20x20 map. Suiciding 20 corsairs to kill enemy mid on sentons so all infrastructure blows up is not even a question. This is not strategy. This is so powerful it isn't even really something that makes sense to defend against because you could simply do the same to your enemy. Either they equalize with a kill on your team or you win the game automatically. Less risk than you trying to prevent the snipes and potentially risking a game loss because someone was asleep with their 10-20 ints for the 15 seconds it takes a snipe to get to an ally ACU anywhere on the map.
Error 6: "At the end of the day, I can't help but ignore that folks are just upset that they died. Yes, your COM exploded. Your team is now at a disadvantage...and thats the literal point isn't it?"
Yes, that's literally what happens in Full Share. Want me to show you streams of Farm and I playing 2v2s where one of us dies and we give up because it's a hugely complicated position and one of us doesn't have the apm to handle it unless we can quickly equalize by killing an enemy player?
I completely skipped everything where you started talking about Valve and Counter-Strike balance.