If we look back at the very first teasers of 8th Edition up to our most current, the Primaris model (stat and gear wise) put everything into much better perspective.
Take the new Morale Phase for example. Many people felt it was would be extremely harsh in application, only taking into perspective the typical one wound old Marine in losing casualties and then the possibility of losing more models due to Battleshock. However, when you take into account a two wound model as the standard, now the casualties start from to balance out the new Morale rule.
Speaking of casualties, look at how some of the enemies of the Imperium are now geared with what has been revealed. Frankly the new gear and rules appear blatantly overpowered when facing a one wound Marine with a boltgun, but are put into perspective when facing a two wound Marine with a bolt rifle.
We have seen the data sheet on Rubric Marines, specifically their weaponry, which would be absolutely devastating against the standard single wound Marines with a -2 AP, but when faced against a two wound Primaris suddenly looks a bit more balanced.
You can see the writing on the wall each time that GW posts up some new info on gear and mechanics of 8th Edition. And I have no doubt that you will in fact be able to play with your old Marines in the new edition like GW says, but without extensive adjustments to their stats and gear, they will be wholly ineffective in a game system that has been designed around the new Primaris standard. Your old Marines have not been voided, but been made obsolete by the arrival of the Primaris standard and subsequent design around that standard.
Now just a waiting game until all the Primaris line is released to effectively build up a new Wolves army.
Edited by Brother Ramses, 23 May 2017 - 04:47 PM.