Hi Tsun, thanks for playing and for the feedback!!
The idea behind the split is that one can choose a style of gameplay as your primary style and use the other one as the secondary style. The two modes compliment each other as there are strengths and weaknesses in both.
For example, you don't need to use your primary weapon in fast paced combat. Shields up and then you can just ram into enemies and do damage to them. The primary weapon can be charged to annihilate enemy bases from far.
I still need to put in a lot of work into balancing of the gameplay, add few more fun features.... Hopefully soon!