The best way to put an end to spamming of anything including LRM spam, is to make the counters more effective. Plain and simple. As it stands right now in Sins the counters are pretty dull. This game needs what i call "hard" counters, meaning for example if fighters are the counter to LRM then 1 carrier should be able to kill 2 or 3 lrm frigates by itself. The problem with the balance right now is the overall survivability of ships. The damage of counter units should be MUCH more severe vs the units they are meant to kill. The reason why LRM spam is working is because fighters or flaks take so long to kill just 1 lrm that they can just ignore them and take out whatever they want. Scouts need to survive in order to scout, and that is fine for them since their damage is crappy, but for the combat units they really need to die faster vs the units that counter them. This would change the pace of the game an awful lot making the combats over a little quicker but i dont think thats necessarily a bad thing it might make it more exciting, and it would definitely balance things.
If the game had Hard counters, it would definitely put an end to spamming of any 1 kind of unit because, it would make the penalty for doing so more severe. THE MORE YOU MASS 1 KIND OF UNIT, THE WEAKER AND WEAKER YOU CONTINUE TO GET VS A LARGE ARMY OF THE COUNTER UNITS. Just do a complete overhaul of the damage vs armor system to change it from 1.5X damage vs the counter to 2.25 or even 3X damage. Expirment with it and im sure you devs will find the right setting but in my opinion this is what needs to be changed.
On a side note, I would also like to see the tooltips improved with the information about the counters. For example dont just say:
"Light Cobalt Frigate: Armor 4, average laser damage 10"
Make it say: "Light cobalt frigate: Armor 2, Armor type: medium - weak vs missles and beam weapons, Average laser damage 10 - Lasers do double damage vs all Light armor types"
Hard counters will make the game more strategic, more about scouting to know what the enemy is making before you just decide to mass something. As it is right now the counters are just a little dull, fighters and flaks dont kill lrm any where near as fast as they should. Plz devs consider these suggestions im a RTS veteran I know it will help. Thank you.