nothing i have said here takes away from variety. the amount of reward you get from 3 round matches is the exact reason fire support IS popular. if you run 3 different ships you get the same synergy in the equivalent of running one ship but it is shared between ship contribution which already causes people to only play one ship. no one should be penalized because they want to use more than one ship on a map that gives them the option of using different ships (im not asking each ship recieve the same amount of synergy as if playing one ship but it not even half of that right now).
like i stated above if people have any issues with not being able to access specific game modes because of being forced into 3/4 ships (remember there are a few PVP maps that make it so if you dont have more than 1 ship you dont respawn so the mechanic is already in place) you will still be able to play the one ship maps that have capture and defense etc. on them. for the 3 round maps you will still be able to chose the ship type but you will not be able to use the same ship slot progressing through rounds. time and effort vs reward and here fire support wins out too much. one ship maps are supposed to be quick plays imo and should not reward you better than 3 round maps that actually take more time and effort to complete since the price of failure is greater.
You are not seing the point; people dont care if its 1 or 10 rounds, they care about time. Since fire support allows faster completion time for a nice amount of synergy, it wins. A lot of people used to play T2-3 PVE captured dreadnought with T5 ships (when it was available) because they could complete it so fast, that they had better synergy/credit income per minute (compared to T4-5 captured dreadnought map). If they can complete a map of 3 rounds faster than one of 1 round, they will go for the 3 rounds one if rewards are worth it (take into account that fire support grants an extra loot atempt unlike all the other maps but defense contract).
"no one should be penalized because they want to use more than one ship on a map that gives them the option of using different ships" (Valkyriewiz). Theres no penalization, just a fair split according to the ships you fly: fly 3 ships, get 1/3 of total synergy on each (3/3 = 100% total). If you get more than 1/3 per ship (while flying 3 ships) you are actually getting a bonus. If you want to use more than one ship, accept that the sinergy will be splitted between those ships because you are flying each one of them less than if you would only fly one ship instead. If you add a bonus for flying multiple ships, then you are in some way forcing players, penalizing players who fly 1 ship.
"for the 3 round maps you will still be able to chose the ship type but you will not be able to use the same ship slot progressing through rounds" (Valkyriewiz). Now you are penalizing, forcing and preventing players from playing what they want. The reason why “Capture the beacons” mode is only for T4 PVP is because its too rough for new players and the 3-4 ships demand in the ship slots is a way to force players to spend much more time flying ships (which should translate on more experienced pilots…therefore more competent for PVP). PVE is not like this and should not. If this rule is applied, fire support will be way more popular than all the other maps (i really doubt players will play 3 round games that way). This also kills random queue.
"time and effort vs reward and here fire support wins out too much." (Valkyriewiz). You finally see the reason why fire support is mostly prefered.
"one ship maps are supposed to be quick plays imo and should not reward you better than 3 round maps that actually take more time and effort to complete since the price of failure is greater (Valkyriewiz). Im afraid you are wrong here: For a long time in SC, maps had different completion times and rewards according to that. After implementing a centralized queue system (1 map available to be queued for 1 hour, unless you go for custom game) times, effort and rewards got homogenised, meaning that no matter the map you play, you would took the same time and get the same reward with a similar success chance. That worked very well untill defense contract and fire support got included in the game: those 2 maps DONT respect the same time, effort and reward that the rest of the maps share. Theres the problem, it has nothing to do with 1 or 3 rounds maps. BTW: 3 round maps allows you to have a chance of a free respawn twice, in single round maps if a player dies and has no duplicators/dont want to use one is a lost player for the rest of the game.