That does not make sense. You're doing so many leaps in logic you're downright bunnyhopping.
Preserving speed scaling over all types of bots so that a t1 lwf equipped lighter bot is always faster than a t4 lwf bot of higher tier is not going to upset balance at all. It won't lead to light bot roaming gangs either. I can't even follow how you come to that conclusion.
Lighter bots still lack firepower and range. You are conveniently ignoring that and I find that rather disturbing.

Heavy hitters always should be at a disadvantage when it comes to mobility. No exceptions, not even with better gear. Otherwise everything below will immediately become obsolete and entirely redundant.

Ping is meaningless here.
The question is: Is this a graphics problem with your fps dropping, which would be very noticeable as the framerate goes down, or is it a problem with packets from the server being delayed? It would be noticeable because the fps would stay high and smooth, but module activations would be delayed, bots would walk in one direction only to suddenly jump to a completely different position etc.

The approach to solving fps is completely different to solving lag.

If it's fps, reducing graphics settings should do a lot, especially reducing shadows.
If it's lag, you're in for some trouble, as just about anything could interfere with it.

Could you clarify whether you mean fps or your bots jumping around thanks to lag?

I don't think you get how the plex system works. It's just a token, and every plex represents money that already went to CCP. Essentially, the value of a plex exists only as a token representing time, but the plex market itself can not spawn resources. It is also governed by rules of supply and demand, which a CCP controlled rmt store wouldn't.

The problem with MT is and has always been that, as CCP explicitly stated, it tries to sell convenience. So to optimize profits, game design is encouraged to be deliberately inconvenient. GW, for example, is selling extra inventory space that was free previously. CCP will be selling space for stored fittings that was practically infinite before but has been limited to 50 now. (As an example of what could happen. The possibilities for making people pay for ccp's terrible design are endless)

Essentially, MT in mmos is always, without exception, an excuse to cut content from the existing game and sell it extra. (Literally. I can't think of an exception. No, not even perpetuum.)

The MT capital you mention would be pay2win. The method of replacing an army of those ships wouldn't involve the industry of eve, wouldn't require an alliance to make an investment, protect and supply their industry and make them immune to disruption during a war. Just spend a few thousand bucks and a new fleet magically appears out of nowhere, breaking the entire game.

That's not to say you couldn't already do it. Most of 0.0 space is controlled by rmt alliances which exist solely to extract and sell ingame items and money, which ccp has been turning a blind eye on. You can just shell out 700 bucks and get a mothership plus pilot, but at least with those deals it's not ccp dropping the pretense of a pvp mmo about using your skills and wits.

I did not leave Eve because of MT.
I left Eve because CCP's intent is to sell convenience. Wich means both pay2win and even worse, charging extra for fixes to deliberately inconvenient and crappy design.

As long as the perpetuum devs don't go pants on heads and want to deliberately break their game so they can sell fixes extra, i'm completely indifferent.