Board choices

Firstly I'm sorry for yet another what board but now after trying a lot shorter board I'm now getting more of an idea of what I want.
On my longboard I now catch loads of waves and I can nail my bottom turn but I can't get my head around moving around and turning at the same time so I can make small adjustments along the wave and stay in the pocket, if I do move I forget to move back or forward because I'm concentrating on turning.
On my shorter board that I bought mainly to see what it's like surfing a smaller board and I actually did 10 times better than I thought. The dimensions are 6'10×20 1/2× 2 1/2 don't know the volume I did google it but it brings up a wider fatter board at 45L so I'm guessing low 40's. when I catch a wave it's awesome I can turn it really easily and I can go down the line and make alot sharper turns, paddling out is possible but as I imagined Alot harder (the good thing is I can kind of duck dive it) and also catching waves Up To 3-4 ft is difficult but possible over 4ft I start to struggle as I can't get the speed up so end up having to take on steeper and steeper waves.
So what I want is something inbetween the 2, I want something that I can paddle in just that little bit earlier but I don't want to have to walk around on the board to get the board to do things, the paddle out I'm not too worried about as I can generally get out in bigger surf than I like on both boards.
So do I just need to add volume to my short board? Or do I need to look at length as well? I definitely want a bit more width to make it that little bit more stable.
So the boards I was looking at,
If I just need more volume maybe the seed or the egg 7'0 or if I need more length the 7'6 egg
www.tombstonesurf.com/?page_id=196
On my longboard I now catch loads of waves and I can nail my bottom turn but I can't get my head around moving around and turning at the same time so I can make small adjustments along the wave and stay in the pocket, if I do move I forget to move back or forward because I'm concentrating on turning.
On my shorter board that I bought mainly to see what it's like surfing a smaller board and I actually did 10 times better than I thought. The dimensions are 6'10×20 1/2× 2 1/2 don't know the volume I did google it but it brings up a wider fatter board at 45L so I'm guessing low 40's. when I catch a wave it's awesome I can turn it really easily and I can go down the line and make alot sharper turns, paddling out is possible but as I imagined Alot harder (the good thing is I can kind of duck dive it) and also catching waves Up To 3-4 ft is difficult but possible over 4ft I start to struggle as I can't get the speed up so end up having to take on steeper and steeper waves.
So what I want is something inbetween the 2, I want something that I can paddle in just that little bit earlier but I don't want to have to walk around on the board to get the board to do things, the paddle out I'm not too worried about as I can generally get out in bigger surf than I like on both boards.
So do I just need to add volume to my short board? Or do I need to look at length as well? I definitely want a bit more width to make it that little bit more stable.
So the boards I was looking at,
If I just need more volume maybe the seed or the egg 7'0 or if I need more length the 7'6 egg
www.tombstonesurf.com/?page_id=196