If it's what you say it is, I love it.
I think all the witnesses that work for the US Government should be allowed government lawyers if they choose. In fact I bet witnesses ARE already allowed to have government lawyers if they choose.
Much like the House Republican's march of the pizza brigade to the secret impeachment proceedings they were already allowed to attend, this sounds to me like demanding something that's probably already allowed. The GOP and the Administration can't defend the substance of the charges so they are reduced to complaining about the process.
I have read nothing to this point that indicates witnesses are not allowed government lawyers in the closed door depositions going on now. However, If government lawyers are barred from closed door depositions, I'll bet when the open testimony begins, at the end of this month, the witnesses will be allowed government lawyers if they choose. It sounds like AG Barr is arguing witnesses must take a government lawyer and, unfortunately for Barr, he doesn't get to set the rules of House proceedings.