With TLJ's merchandise launch today there's been a lot of revelations about the new tech in the sequel, as well as some other details a few weeks ago.
http://www.comingsoon.net/movies/new...ealed#/slide/1
http://www.comingsoon.net/movies/new...ealed#/slide/1
https://www.reddit.com/r/StarWarsLea...r_toy_vehicle/
Basically, it looks like we're getting two new larger Destroyer variants-The Dreadnought, which sort of looks like a flatter Star Destroyer (Similar to the Interdictor class seen lately in Rebels) but all black, and the unconventional Mega Star Destroyer, which is a sort of boomerang shape instead of a wedge.
There's the "Gorilla Walker" the AT-M6. The cannon reminds me a lot of the old AT-IC prototype from the abandoned post-ROTJ Kenner line. http://starwars.wikia.com/wiki/All_Terrain_Ion_Cannon
The Ski speeder kind of resembles a B-wing, in a similar fashion to Leia's transport in Force Awakens. Given how the B-wings always used to be sort of potrayed as these extremely powerful starfighters in the EU, it's kind of funny to see them pretty much being used for spare parts in other ships.
There's a new model A-wing, which like the REBELS version closely matches it's concept art, sort of like the approach they took the X-wings.
There's a new Resistance frigate glimpsed in the trailer during the space battle, which seems to mix various aspects of Rebel ships like the Escort Frigate and the Blockade Runner.
Overall it seems they're pretty much going in a similar direction to TFA as far as design goes-mainly giving us slightly different versions of OT tech, and I suppose that could be used as an argument about Disney being "unoriginal"....but when you think about it, a lot of the designs in the prequels were fairly deriative of the OT too-the first ship we see in TPM more or less a Blockade runner with a slightly different bridge, and AOTC and ROTS have ships that closely resemble Star Destroyers and TIE fighters, as well as rebel craft like the X-wings and A-wings...even the EU stuff seperated from the films has largely stuck to some variation on the film's designs-just look at the "Knights of the Old Republic" games, where you're basically piloting a ship that's more or less the Millenium falcon, and the ships were OTish enough that they pretty much-with slight alterations-became the basis for the Hammerhead ship seen in Rogue One.