Struggling with bigger waves

Hello again everybody.
Over the last year I've been flying with my progress front side and backside but the thing I've struggled with is when it starts to get that little bit bigger/steeper.
The board I've been riding is 6'10× 22" can't remember how thick it is but about 47l volume. Where I surf is a beach break if its too big at the north end keep heading round the bay it gets smaller as you go further round.
What I have mainly been surfing there is when magic sea weed says up to 4-5 ft 9 secs I surf the north end anything over that I start heading further down.
My problem comes when the period starts going up. Just recently it's been 5-6ft 13-14secs which although I'm happy and comfortable with the size I cannot find the right take off spot. The waves seem to lurch from 45deg to catch to vertical drop in within a space of seconds. Now watching others I'm in the right spot but I either get sucked back up and over the back of the wave or have a near vertical takeoff. I just can't seem to match the speed.
So my questions are these
1) should I be kicking to try and help build up a bit more speed when the wave is before 45deg? A friend who has only surfed shortboards for the past 20 years said to do that but as my shins are still over the board would this work? At the moment I'm just relying on my arms.
2) can you have too much volume when it gets bigger which is why I'm getting sucked up over the top? If I went for a slightly thinner board not so much shorter but more short board shape to reduce the volume?
3) should I just accept that I've got to do late drop ins (it seems only me that does it everyone else seems to have loads of time but also they have more experience than me) buy a really short board for when it's smaller and just keep practising late takeoffs?
Over the last year I've been flying with my progress front side and backside but the thing I've struggled with is when it starts to get that little bit bigger/steeper.
The board I've been riding is 6'10× 22" can't remember how thick it is but about 47l volume. Where I surf is a beach break if its too big at the north end keep heading round the bay it gets smaller as you go further round.
What I have mainly been surfing there is when magic sea weed says up to 4-5 ft 9 secs I surf the north end anything over that I start heading further down.
My problem comes when the period starts going up. Just recently it's been 5-6ft 13-14secs which although I'm happy and comfortable with the size I cannot find the right take off spot. The waves seem to lurch from 45deg to catch to vertical drop in within a space of seconds. Now watching others I'm in the right spot but I either get sucked back up and over the back of the wave or have a near vertical takeoff. I just can't seem to match the speed.
So my questions are these
1) should I be kicking to try and help build up a bit more speed when the wave is before 45deg? A friend who has only surfed shortboards for the past 20 years said to do that but as my shins are still over the board would this work? At the moment I'm just relying on my arms.
2) can you have too much volume when it gets bigger which is why I'm getting sucked up over the top? If I went for a slightly thinner board not so much shorter but more short board shape to reduce the volume?
3) should I just accept that I've got to do late drop ins (it seems only me that does it everyone else seems to have loads of time but also they have more experience than me) buy a really short board for when it's smaller and just keep practising late takeoffs?