With the talk of "tiericide" & power cores, I thought that the plan was to remove slot numbers as progression.
Looking at these numbers, it looks like this is a proposal for "right now" that will then be replaced with tiericide later.

So just checking, the plan is:
1. Normalise the slot counts right now within the existing game. To give you a chance to check that the proto number of slots are balanced fine for each race.
2. Later on with tiericide, standardise all suits on the number of slots that were given to proto

Please, please don't reduce equipment count on any logi. 2 at standard is NOT ok, it is the same as what scouts have, how is the logi supposed to be the equipment specialist if a std scout can do the same job as a std logi? 3/3/4 as the Min has at the moment is acceptable, though I think you will find a lot of logis would support a 3/4/4 progression (if not 4/4/4), for good reasons too. The equipment is what defines the logistics class, making the 4 unlock only at proto is inelegant in my opinion (though, I assume some would say 4 at even adv is somehow OP :/). And giving logi suits only 2 equipment slots at std is worse. And yes, that is what the Cal and the Amarr have at the moment, there are reasons why so many of us logis have been asking for this slot progression balance pass for a long time ;)

Personally I believe that the Caldari extra (low) slot in trade for the one equipment slot is fair, but unnecessary... It should really just have the same standard slot progression, just mirrored with the Gal, but I thing actual Cal logis should weigh in on that. With one less low slot but another equipment, it would still need some adjustment to it's CPU (as you are correct, it is paying for the old sins of it's original suit bonus and the power of the tac AR).

The Amarr logi trading a sidearm for an equipment is also fair enough, it should get the same amount of total slots as the others as well.

This would be a nerf to most Logis would it not? Could you explain your reasoning behind this?

Why? Honest to god, the only reasoning I see for this is the calculations popping up in other threads on how the Caldari Logi specifically would become too good again in comparison to the Cal Assault... Which I personally see as an issue with the Cal Logi and Cal Assault suits, NOT the whole Logi class. And I thought you proclaimed your lack of fear of killer bees?

You've already stated you're planning on making fitting Logi suits more... difficult is not the right word, necessary, but more equipment focused ( as they should be) and as a result, less versatile in other areas (not necessarily entirely a good thing). The thing with reducing module fitting capacity is that... brick tank is actually easier to fit in many cases than most of the utility modules. Which is not a purely Logistics related issue, but should actually be looked at as a whole to encourage people away from bricking any and all suits anyway... But I digress.

As you're already partially walking back the speed canges to Logi (I am referring to sprint speed remaining the same as now) AND also removing a module slot on top of that, we're maybe even looking at a net nerf to Logis O.o Why do you think it would be necessary?

8 slots + 4 equip + Light + Sidearm on all four in exchange for the grenade slot? Or sidearm on just Amarr/Cal for the grenade?