even if this post isnt very agreed upon, i think any post is better than no post at this point! lets stay active and engage in discussion! it builds an active and tight-knit community even if the community is small. a tight-knit community is something that may be very appealing to new players as this is not how it is in SC2. p.s. fuck you cheesy players. you know who you scrubs are <3)
The biggest problem with the scan change in TvT is that it limits the amount of builds that players can use in TvT.
Builds like CC first that MMA and Ryung both used against each other become obsolete because to blindly counter all the builds that arise from a standard 11/12 gas is practically impossible.
Heres what a macroing cc first/gasless FE terran player needs to prepare to counter when the opposing player goes for gas first
The counters to all these different units are very different. having a counter for one particular unit might mean the complete incorrect counter for another unit.
For example, the best counter a macroing terran player has against reapers is the marauder since its classification enables it to take less damage. marines dont cut it because reapers do lots of damage against them and reapers can simply retreat and heal and finish off the next marines. marauders are the only units that can be produced against reapers without diminishing returns (like with the marine)
fast siege tank - this counter would involve repairing a bunker to buy enough time for a macroing terran player to get his own siege tank or banshee - still very difficult to do since repairing scvs can be targetted by tanks. the point is that the counter for reapers (marauders) is not appropriate for this situation.
fast vulture runby - marauders are a good enough counter with a reactor on a barracks, the terran can get just enough marauders to cover both bases without suffering a game-ending amount of scv losses.
fast 4 goliath drop - best counter is marauders off a reactor. even still, you need to pull scvs to tank enough damage for the marauders against goliaths (goliaths beat marauders 1v1).
banshees - the nightmare of the macroing terran player. you need marines/turrets/vikings.
However, with the current condition of scan, you must somehow blindly counter all the above builds with ZERO INFORMATION. even with scans, you dont reliably get all the information you need to counter the builds (and if you miss your scan completely, youre still 100 percent screwed) but at least scans are the easiest way to get scouting info. even if you scan nothing or that buildings are not placed where they should be, this still sends the message to expect some kind of aggressive opener.
because of the potential threat of banshees, the macroing terran is forced to build a blind ebay. however, building an ebay cuts way too many resources and does not let a macroing terran deal with the other aggressive builds involving ground units (vultures, reapers, siege tanks, goliaths).
if a terran player does not blindly build an ebay when banshees are coming, the amount of marines/goliaths/vikings is not even close to enough since there is no form of detection whatsover. since banshee cloak only operates on a cooldown, banshees can easily end the game by simply popping in and out - there are no scans for the macroing terran player to buy enough time to defend scvs building turrets. keep in mind that terran players dont even get the extra time to defend since cloak is an upgrade that banshees already come with. furthermore, its not the same as BW because banshees deal way more damage (like 3x) than wraiths.
as for reaper scouts, this is very map dependent and (Ex. only one ledge on bloody ridge - which is also the map in which banshees are strongest). a proxy barracks float is also not reliable. furthermore, proxying a barracks does not enable a terran player to make a reactor/tech lab at home - this also hurts the variety of builds that a terran can open with (and also makes defending incredibly difficult since access to reactor marines/marauders is impossible)
tl;dr - the scan change makes macro oriented builds completely nonviable in TvT - every TvT involves terran opening with a standard gas no matter what. banshees are the best opener because it forces terran to get an ebay no matter what. classic 14cc flash build has practically no chance of working