As for the lowering the BTC50 donations, it could be seen as unfair to those who actually paid the BTC50 to get their badges.
To be fair, if Btc was worth almost 30k when the old donators donated, noone would have donated anything. At least nowhere near 50btc. The price for donators badge should have been set at a dollar amount vs btc amount and people might still be willing to pay the price today.