Creation bots:  Bots whos sole purpose is to terraform. Big and slow and vulnerable.

Land Destruction bots: 

Bots whos sole purpose is to destroy terraformed land.  Very slow and large, high defenses against player attacks but vulnerable to turret and base defenses.  Im thinking like a bigass drill bot with lots of armor.  Has the ability to cut a small hole in a terraformed wall, doesnt need to be fast with it.  If successful in breaching the wall will create a choke point from which enemy players can enter the base.  Think medieval battering rams.

Structure Destruction Bots:  Bots whos sole purpose is to destroy turrets and buildings.  Think catapults but robot style.  Would have to be ranged...im thinking more like robot artillery or large missile launchers.  Would have to set up before firing which would take time.  Large and slow, must go through a long set up process before shooting and a long take down process before moving.  Vulnerable to everything.

Structure creation/repair bots:  Big slow and vulnerable.  They just build structures and repair them.

The whole purpose of this suggestion is to focus back on robots and players rather than turret walls and 8hr terraforming so we can siege a base tactics. However creating an attacking siege force should be risky (expensive) as well as slow and obvious.  Turrets might have to be modified to create longer range but only good against siege bots, as well as turrets to stop the normal bots.  My thoughts are to have the siege bots be very expensive where the corporation would have to work to create them, and then have to carefully choose where to use them, not a bot that can be spam produced and then swarm an enemy base.  With the artillery bots i was thinking more like mobile structure with a large gun, or an ICBM like missile launcher thats needs to be set up, go through a fueling process ect.  It would almost be like setting up a temporary attack base close to the enemy base.

Obviously this is all a loose suggestion, and something that would take time in working out the details.  I just feel that the current base and base destruction process is long tedious and boring, and after all that its usually not worth doing given the time involved.  With seige bots it might make it a bit more entertaining and game like.  I would also suggest drastically reducing the cost/time building structures (construction bot?).  More bases is better imo, especially if your going to have a series of bots meant to destroy them.

Possibly make them all gliders as its lame to have an EP category for one bot as currently.  I dont want it to turn into something where its pointless to have a base because its going to be so easy to wreck it, i just want it to be more enjoyable to take and defend a base. Making bases relatively easy to make would a good start, easy to make but perhaps hard to make good if that makes sense