Sucks for those who like to do 8 local and 8 field leves every cycle. Field leves are by far the best way to rank up DoL so you're in effect losing 4 awesome leves per cycle. I took both MIN and BTN to 50 while spamming local leves for BSM and ARM. Had this change been in place I'd probably not be anywhere near 50 in one of those. Though I wouldn't have missed the 5 or so leve cycles I have in the past couple of months so I'd have made back a bit ground. Still less over all.
I'd like to take fishing to 50 but with this new system it's not going to happen now until all my crafts are 50 since I will prioritise crafting over fishing. I'd love to sit and spam as many fishing leves as possible before 1.19 but it's probably not worth it until rank 25.
Over all the new system is great, but they should have made it 5 leves per 12 hours to try keep almost the same number.