What would you change to SLS and Artemis program if you were in charge especially over Jared isaacman 🤮 changes. First off I love gateway, EUS, and NHRO orbit keep that second I would rather for first few landing 15mt two stage like Altair (hydrogen descent and hypergolic ascent stage) but all one launch like Apollo by launch both Orion and lander on block 2 instead current HLS refueling mess. Revive OmegaA heavy would be helpful for Block 2 bole. I do like Jared isaacman using centaur v with end of ICPS production and goal increase launch cadence. I think RS25 too expensive definitely needs to use ULA smart reuse technology. My Block 3 concept using upgrading EUS with help and partnership ESA carbonfiber tanks with BO hydrogen anti boil off tech for science mission. Block 3 spaceplane hydrogen tanker reusable upper stage that refuel EUS in orbit and return back. Revive atlas V RD180 engine smart reuse then transition to AR1 for starliner mission so they proven and crew rated on a Firefly and Northrop Grumman partnership using engine on reusable liquid rocket booster. Also be so cool use all 4 VAB space stack 4 SLS being built like Saturn V and increase launch cadence launch up to 25 SLS a year. Lastly more big and rapid science mission to further astronomy, defense, Enginnering, and etc. I believe moon is good place to be test for nuclear reactor design due regulation hurdles on earth. I also don’t think good idea use hydrogen on moon for propellant but I think oxygen in regolith is a good idea. 15mt Lunar lander would be partnership between Japan and Boeing especially with past and also USA goal landing Japanese on boots on the ground on crew landing. I agree change Artemis 3 and 4 not being landing and Artemis 5 be surface lander. 

This my SLS block 3 concept