for me persona problem of this replacement is only license switching from strong copy left to permissive
Why does it matter to you? If the developers are fine with the license and how the code they write can be used under it, that’s their prerogative. You don’t lose anything if some company also uses those programs.
I don’t know who exactly staying behind rust coreutils but devs just ignore all request about GPL
What are you expecting them to say? “That’s the license we chose for this thing we’re allowing you to use for free. Use it or don’t, we don’t care”? They have no obligation to justify themselves to you.
will not support MIT licence as for main tools for importan core of system
What do you mean by support? Would be be donating money to the developers if the license was different? The developers don’t get anything from you using their code.
Why is that a problem if the developers are apparently fine with it?
Everyone can still use the open source version/fork. It could only become a problem if distributions for some reason decided to use that closed source version, which doesn’t make any sense.
I fail to see a worst case scenario here beyond companies being able to profit from the software as well.