I personally think that they will be holding to movie and Rebels ships in future waves.
meaning that the gunship and firespray that a lot of people want to see will probably not happen for a very long time.
for instance, the new shuttle from the pre-views and the heavy duty tie with turret
You're making a pretty big assumption there - that neither Rebels, Force Awakens, Rogue One or any of the upcoming films will include existing ships from the EU.
And as we've seen from the Rebels season 2 trailer, that's clearly not the case.
The new Rebels trailer features a number of EU ships including the Immobiliser 418 cruiser (now probably guaranteed for Armada) and what looks like the Scurrg Bomber featured in Armada's Wave 2.
Rogue One is set prior to Episode IV, and as such could well also feature early Rebellion and Imperial ships rather than all-new vehicles and designs.
TL;DR? contrary to widespread belief, Disney have not "abandoned" the Extended Universe, and continue to draw from it going forwards - and so will FFG.