We all know that the best suit in DUST at the moment is a proto logi. they're superior to every suit in pretty much every way and more people are running a logi as more of an offensive suit instead of support/defensive making the assault suits redundant.
Hell my gallente proto logi fills every role i need. i can get a 9.25ms sprint speed with 590 stamina and 4 diff types of uplinks, i overtake scouts an dget more proto links out and despite having low hitpoints its still more than a scout suit.
As an assault i have a great tank at cost of movement but i deal great damage and can have equipment to benefit me, rep hives, scanner, pig sticker ect.
So my thoughts have been a few changes to the suits to get them more in balance, some of these ideas are passing thoughts i've seen on the forums and others discussed while in my corp chat/squad chats.

Firstly the logis. the skill bonus is great, it benefits the logis and helps keep them alive sure some don't fit the suits tank type but ccp have mentioned that suits will eventually get individual skill bonus to fit the role. one idea to 'force' a logi to support is removal of the light weapon slot and just have a side arm. now personally i think that is a fantastic idea, you're supposed to be at the back repping your heavy, sticking the troops and dropping ammo, not at the front guns blazing all out. but for compensation give each logi a bit more cpu/pg to fit higher grade equipment more easily, the problem with this though is finding something which would make the amarr logi stand out seeing as its sidearm is its 'speciality' perhaps a second sidearm slot or maybe even an extra grenade slot for AV/Anti infantry nades.

Now to fill in this combat logi role and to get more people running the assaults or commando.... simply add an extra equipment slot. it would open up a ton of options and help frontline troops have a bit more flexibility with what they carry. add a small amount of pg/cpu but not too much so folk are stacking allotek (R) and wiyrkomi triage hives and being awesome but enough that they can have adv hives and a pig sticker or uplinks to help stay in the fight a bit longer while the logi is attending to the rest of the squad. just help to make assault guys more self sufficient but still need that dedicated squad member to hold em together.

Also the gallente assault bonus really needs looking at. the cpu/pg to hybrid weapons is really poor. at max you'd save 22 cpu on a duvolle whereas the logi comes with around 100 extra cpu base and an extra lowslot.
maybe change it to a reduction to armor plate movement penalty or an extra 3% per level to armor plate effectiveness or hell even a 5% or 10% to stamina per level so its more mobile would be more usefull.

anyways thats my thoughts, feel free to add your own and make changes. thanks for reading