Like Im saying, I will have to wait my next client (because I will lose the current), to see the problems of Telerik solved in upcoming versions? Where the support insists that a Read-Only property acting like a Visible property its correct, and see, its just not my case, in forum have a direct question about that, and several with people putting a lot of code to solve this. Of course, this question its not that having stopped my work, and its a minor problem, that have a bad workaround, but have... Its just a sample of Im saying...
Im really in a dellicate schedule situation with my client,
While I cannot give you a precise estimate as to when/if the functionality will be available, I assure you that it will be considered. The present set of attributes cover the big portion of scenarios for the columns. Nevertheless, having an additional attribute to cover your case, without the need of extra code makes sense, and it will be reviewed for one of the upcoming versions of the control.
the Telerik team