50 Acoins for a specialisation spree is pathetic. It's not as if they are even easy so at least such measley amounts makes my mind up that it certainly isn't worth the grind so I can enjoy my time doing other things instead.
Have you seen any other than measley rewards in the last weeks in events or challenges? Here a few credits there an amateur crate or.....wow.....a bunch of mostly useless blueprints. Nothing that lets you stick to the game in the long term.