Caldari = shield tanks.

Might not be much better at Armour, but almost certainly getting a shield increase.

http://www.ign.com/videos/2013/03/05/dust-514-dropsuits-make-the-man

Skip to 1:00 for the bit about frame size.

And the point was that there might not be any more Assault suit variants. If each faction only gets one medium frame, then Amarr might have their Crusader suits as the medium frame size, and no Assault equivalent, and Minmatar will still only have the Logi. Depending what the Gallente medium frame turns out to be (possibly Pilot), it's possible that there will be 4 different medium frame size suits with each one filling a totally unique role on the battlefield.

You SO missed the point.

At the moment, Minmatar only have one suit type. That suit is a medium frame, the Logi. They'll also get a large frame (similar in size to the current Amarr Heavy e already have) and a small frame (with a similar profile to the Gallente Scout). These suits will have unique stats of their own, just like the current racial variants in each size.

Pilot suit might be Gallente's medium frame suit, and with the Command suit being confirmed to be called the Crusader suit, it seems likely to be Amarr. Probably also medium frame, giving each faction a medium suit with its own unique role.

There's also the fact that it was "at least" one suit for each frame size, though, so there may be additional suits in any frame size, meaning a non-Logi Minmatar medium is also a possibility.

And the point was that there might not be any more Assault suit variants. If each faction only gets one medium frame, then Amarr might have their Crusader suits as the medium frame size, and no Assault equivalent, and Minmatar will still only have the Logi.

You missed the point that each race will have at least THREE (small, medium large) suits. Not just a small suit and a large one. And everyone also seems to be missing the "at least" part as well. Crusader Suits aren't a "sit in the MCC" Commander. They're a suit with modules that provide buffs to nearby allies. You wouldn't use that on the MCC, because the people you're commanding aren't nearby. They're on the ground. You use it when you're on the front lines. It's still a front-line combat suit. Like the Logi suit is.

Given the fact that there have been multiple clips - including an official promo video - where we've seen evidence of a Caldari suit that holds Heavy weapons, it seems logical that Heavy Weapons will be standard on Large Frame suits. At the very least, we know the Amarr version can hold them, and the Caldari and Minmatar wouldn't make a weapon they can't field, so there's no way they'd make their Heavy equivalent NOT able to hold such weapons. Heavies seem likely to fill the "slow with big guns" role regardless of race. But racial variants will have different stats and possibly a side-grade type role on the battlefield. Kind of like the current Type I vs. Type II setup. They're still the same "class" in a way, but they're different ways of achieving the result. The same thing could happen for small frames with all the small frames filling a similar "hit-and-run" role to the Scout. Mediums would be the more specialised classes that give each race a particular focus. And it seems plausible that the medium frame size would also be the point where "at least" kicks in first and each race gets a second variant. Maybe not for all of them, but it seems more likely to see at least 2 of the races get a second medium frame suit before anyone gets a large or small.

Also, my SMG fits just fine on my Logi suit. And when your primary "weapon" is your HUGE array of explosive devices (Grenades, REs, Proximity Mines, more REs because LOL...), having a secondary weapon that's actually a full-featured Assault Rifle is pretty nice.