Yeah I lack the skills to pill info from the blockchain also.
One point to remember, is MVests get more expensive with time even if the price does not change. One buying in today versus a year ago is going to pay more for the MVest than the one a year age even if the price is identical. That is one advantage to being in early and staying in.
You are correct in that a Whale could cash out and buy back in...just like someone else can come in with a large stake if he or she wanted and become an instant Whale.
However, the sell out, buy in game at these levels is a risky move. Some might get it right but if they miss, it is costly. The worst thing to do is to sell while believing the price will be cheaper to buy in and have it run on you. This easily could happen.
I am not sure I follow you about the reputation...that is not based on MVests...if one powers down, he or she maintains the reputation.