there already has been certain changes in the team , but i feel like there is still place for improvements .
For example :
1) Blissey . I like the fact that you tried something new but well in my opinion the set is not all that viable . i dont see the need to use counter when you have a defense of only 130 as you will get ohkoed by most strong physical moves and any super effective physical move . Blissey's main role is a special wall as well as a sponge for status conditions . Giving up natural cure for serance grace is not adviced . Its only direct attacking move is tri attack which tbh does very little damage . I do see your motive in doing so , but trust me , in the longer run its not that helpful where you will have to face balanced teams and stall teams.
2)Landorus : This is completely optional but i would suggest stealth rock on blissey and defog on lando , that way you can fit toxic on lando. Another possible change could be 0 speed lando to have the slower lando in 1v1 for slower u-turn to gain momentum , in the same way lando can run 252 def so that it can check stuffs like kartana , and rilla more effectively.
3)Last but not the least , do you really want to give up something like leftovers or assault vest on melmetal for only 20% chance to hit first in a particular turn. It is extremely rng reliant , moreover you can use leftovers to get assured 6% health recovery or assault vest for increasing melmetal's sp def which is low compared to its physical bulk