Let's not get condescending in tone, I think you misunderstand some of what's happening here.
Both proposals require land swaps with the garden, look at the MTA's renders, they are also planning to envelope the garden with a pavilion, with new street retail and corner entrances. A roof deck for the garden is shown on top of the pavilion in both proposals. These buildings will be wed to eachother very closely when this is said and done- in either scenario. (Moreso in the ASTM plan, to be sure).
Both have the midblock concourse & atrium in the exact same place (connecting to penn south in the exact same ways). ASTM was designed to fit into the general project plan for the area. These proposals enhance the connection to 7th avenue in the same way, with a widened concourse connecting to the 123. Improvements outside the station itself will probably be handled by sites as they are redeveloped (chiefly by Vornado). This part is a little unclear after Hochul's announcement this week.
The MTA's atrium is better, since they plan to demolish and rebuild the bridge to the garden. There is currently mechanical equipment on the roof of the bridge that will need to be relocated to the roof of the new Penn station pavilion that wraps the garden. ASTM prioritizes the 8th avenue entrance instead.
Do look at the layering gif on PAU's website, it is helpful in grasping the extents of their plan.
https://pau.studio/what/new-new-york-penn/
Real question, why are you so clearly angry at the ASTM proposal? It's introduction has only strengthened the MTA's proposal, and is steering it towards a better project. What is your long term desire for penn station/the garden? This isn't James Dolan's proposal here. I bet MSG would prefer not to have a new pavilion wrapping their arena so they'd have the option to build a new garden here in the future. They publicly have shown that they would prefer not to move - ever, since they are pushing for a perpetual extension to their operating license here.
Personally I like that the ASTM proposal reintroduces the idea that Penn Station is a building, and not a canopy entrance to a subterranean concourse. I think if the garden ever does move then they can hollow out the drum and make an incredible interior public space (This could happen in either plan really), and if not the interior spaces here are nothing to laugh at.
I think the MTA's plan has really come into focus and is also great and promising, their mid block concourse would be on a truly grand scale. I think it leaves something to be desired at street level right now, and like NYguy has suggested, integrating the facade of the garden into the station will make for a much better composition.