That is why the slider mechanic has to go... it is just very unintuitive to the average player. (my opinion anyway)
It's not *so* complicated. But it's really non-ergonomic. Usuability is shit.
On big map, with 40 or 50 planets...
... with old system, I put all slider on production and projects (research or monney, most of time). If I start building a ship, it automagically take a part of the production to build it. Simple.
... with the new system, I have to put the slider 100% on research, or 100% on monney. If I start buiding a new ship, it does... nothing. Because production is 0%. So I have to manually set each planet on production, build my ships, and then go again on all sliders and re-set the sliders on research or monney.
It's... a little bit crazy, it can be a source of errors (by forgetting a planet), boring, and... I don't understand the goal of this mecanism. Planet specialisation is a Good Thing. But this un-intuitive system make the game boring. The old system was far better.
If the devs don't understand what I try to say, try a game in difficult mode on a immense map, you will see 