try adding a new row only for comparison's sake and in that row include a what if scenario when you only invested all your money in bitcoin and never bothered with the notion of "portfolio" and then try calculating how much money you could have had in you did that. it can be an interesting factor specially in the long run.
That would be a very interesting factor indeed. At least, with such kind of factor, you can correlate how you are doing at the moment compared to how you should have done if you go the other way. There is always the need to have an informed decision or will I say a feedback on your strategy which is why correlations like this are always important. I would really suggest this factor as well, but all in all, it is a good thing for the OP to be sharing such a brilliant strategy.
Holding such a big variety of coins is definately a very safe option but won't bring you as much profit as it would give you if you'd choose only 4 to 5 of them.
Choosing only 4 to 5 of them does not mean on the average you may have more or less than choosing all what he has chosen. What is important is to just choose the number of coins you know you can handle and then stick with them as you keep managing your portfolio like the OP did. It is a good strategy and good of him to share it with the community as a lot of people may not even understand what re-balancing is all about and how it can help them.