I'm not concerned with NTFS. If you really want it, there is pretty good support with NetDrive. Compared to NetDrive, I thought the NTFS driver in eCS is buggy. NetDrive is limited, but provides good read/write support to an NTFS drive on a Windows XP system. NetDrive is not bootable. The eCS NTFS driver is probably already bootable as long as you supply UNTFS.DLL, the mini file system driver for the boot environment.
My real concern, not for eCS 2.0, but ongoing, is the 2 TB limit. 2TB drives are in the stores now. We can or nearly can boot from a 2 TB JFS partition. But going beyond 2 TB is a barrier.
Making this happen for OS/2 will take changes to the kernel, to the file system, to the DASD and LVM drivers and to the OS/2 API. File size is currently limited to 2 TB as well. Programs will need to be recompiled to get greater than 2TB support.