Regarding the quick takeaway, according to many pros, that causes everything to be out of sync and thus your weight may not transfer properly and/or timely to your left side. I have had that problem throughout my life; sometimes I transfer properly and sometimes I do not. In fact an article I read recently said that a slow takeaway enables you to synchronize your swing - upper and lower body parts, that is - thus enabling you to transfer your weight better. I have tried that in my last few rounds and that has worked. Some people can synchronize a quick takeaway but I cannot.
I don't think the takeaway causes me to come down too steep but I tend to pick the club up a little too steep when I begin my takeaway, then I come down too steep. Many pros recommend bringing the club back (for drives) low and slow. I know that works great when I am consistently doing that. However, my bad habits reappear and I take the club back too fast and then I get out of sync - my weight hangs back on my right side - and I have to flip the right forearm over (subconsciously) to catch up. I agree that you have to raise the club from the ground upon beginning your takeaway; however, I raise it too much and follow that up by coming down too steep on my downswing.
I'm just trying to renew my game. I used to be a consistent 13 handicap golfer but in recent years I have regressed; part of that I believe is due to my shoulder. I could sense it becoming weak over the past two years. Now, accepting the fact I am advancing in age (49) and coming off labrum/AC Joint repair (5 1/2 months post-op), I will be switching from a 10.5 stiff shafted driver to either a 9.5 or 10.5 regular shafted driver. I know most advise that anyone with a slow swingspeed should not even think of using a stiff-shafted driver but a few Golf Galaxy employees and a friend who knows my game, advised that I should go with a 9.5. I'm very undecided. I am going to wait a few more month until I am about 7 1/2 months before buying a driver.