I voted No. Changing the rules after the start of the game can only lead to drama if it leads to someone else being the winner.
Never thought in that way. You are correct LoyceV.
If blocks are mined at a same rate in next 19 days:
First block of 2020= 607431+(22*138.3)= 610474
I guess it's not going to be same for the next 19 days. On every 2016 blocks, we will have adjustment for maintaining the average time of 10 minutes for blocks.
19*138= 2622 blocks, we will see 1/2 adjustment within these days & it's very possible to be higher than the block you calculated.