So how hard is it to improve by at least 18 games, which is what it would take to get us to the 70 win level?
The conventional wisdom is that such one season improvements are pretty rare, but I wondered how rare. Here are all the 18+ game improvements in this century. We can't do this for the last two years of course because 2020 records don't indicate much:
2001 Hou+21, Sea+25
2003 KC+21, ChC+21
2004 Det+29, Tex+18, SL+20, SD+23
2007 Cle+18, ChC+18
2009 Sea+24, Colo+18
2011 Milw+19, Ariz+29
2012 Balt+24, Oak+20, Wash+18, Cinc+18
2013 Bos+28, Cle+24
2014 Hou+19, LAA+20
2015 Tex+19, ChC+24
2017 Minn+26, Ariz+24
2018 Oak+22, Atl+18
So nearly every year, there is at least one team that improves by 18 or more. Over a 19 year period there were 32 such improvements, and in more than half the years (12/19) there were at least two.
So chances are pretty good that at least one major league team, and very possibly two, will make at least an 18 game improvement next year. And of course it is more likely that those team(s) will come from the lower half of the league this year, given that it's much harder to improve that much on a team that's already good.
Worth noting that only one team in the 21st century, the 2008 Rays, improved by 31 or more games which is what it would take to get us a winning record next year.
There’s not really any point in discussing it until we see who’s on the roster. I think Adley will be up much sooner than June 1. Grayson probably won’t be, but let’s see what happens with the CBA, what happens in spring training, etc. I do think the team is likely to be significantly better next year, but how much better depends on roster moves not yet made.