hey there. before i work out any weaknesses with this team, i first want to just adjust some of the movesets and EVs you are using.
absol without
sucker punch and superpower is just not even a good set. sucker punch grants you extremely powerful priority which is useful in many cases considering that you do not have anything that is immediately fast. superpower is just necessary because dark/fighting is pretty much perfect neutral coverage.
life orb would also be the best item on absol—banking on critical hits isn't always the way to go and you could just boost the overall damage output instead.
next off, bastiodon could run several things in its last moveslot: protect, magic coat, some attack like metal burst. it's rather weak to attack, so i would just try out
protect over sandstorm to accumulate some toxic damage and gain a bit more leftovers recovery. however, there are many things better than sandstorm that you can test that don't really hinder bastiodon's main role.
lastly, acrobatics drifblim should be running
252 atk / 252 spe with a jolly nature. you really want to be outspeeding jolly absol, adamant sawk, and positive-natured base 70s such as samurott and ludicolo.
absol / choice band sawk / musharna / ursaring / bastiodon / acrobatics drifblim
this team seems like it would have major problems with water-types such as ludicolo and gorebyss. once they are boosted by either rain or shell smash, all you have to stop them is absol's sucker punch. this is rather unreliable considering it cannot OHKO ludicolo, while gorebyss could be carrying substitute.
try running an
offensive ludicolo of your own over ursaring. at decent health, it can handle a +2 gorebyss and gain a chunk of that hp back with giga drain. it also checks opposing offensive ludicolo; despite being a bit shaky with this, it should weaken it enough for something like absol to pick off afterwards. it pretty much fills that "sweeper" role that you wanted ursaring to fulfill except that is much faster in and out of rain.
also, with snow warning snover being in NU now, musharna isn't the best choice. should you face a hail team, moonlight will only heal half as much as it normally would.
duosion would be the best replacement with the exact same set except that it has the more-reliable recover instead. it still counters choice band sawk, gurdurr, and the same things you wanted musharna to do. however, duosion additionally has magic guard which is a huge help considering you don't really have a way to deal with alomomola with the rest of your team.
summary:
sucker punch and superpower life orb scope lens absol / choice band sawk /
duosion musharna /
offensive ludicolo ursaring /
protect sandstorm bastiodon /
252+ spe acrobatics drifblim