I disagree with both increased resource production and increased research speed.
That sentence:
jesusnation wrote:
The game would be a lot more exciting if countries are able to have a larger variety of units, just like in a real war.
is completely right, though!
Has been discussed in other threads already (e.g. -- this one --). But that shouldn't be solved by speeding up research or by adding further research slots or similar. Instead, the costs or research duration of higher levels should be increased. This would give an incentive to first research level 1, 2 and maybe three of many units and only then to continue with the higher levels. Which nobody with a brain would do in the way the game is right now. But which would be both more realistic and more interesting / challenging from strategic point of view. Each time you have a free research slot, it would be an interesting decision whether you go for level 1 of a new unit or whether you upgrade your existing ones (more beneficial, but also more expensive, then). Whereas at the moment, you only decide at the beginning for approximately 10 units and then research and build them to the max... on autopilot... big boredom.
For example this way:
All level 1 research: -500 rare materials compared to now,
all level 2 research: unchanged,
all level 3 research: +500 rare materials compared to now,
all level 4 research: +1,000 rare materials compared to now
and so on...
Or if you prefer that:
All level 1 research: -20% research time compared to now,
all level 2 research: -10% research time compared to now,
all level 3 research: unchanged,
all level 4 research: +10% research time compared to now,
all level 5 research: +20% research time compared to now,
all level 6 research: +30% research time compared to now.
Of course the units in the secret weapons research tree would also have to be slightly adapted, so they neither profit nor suffer from the change.