Cluster aware FS for shared datastores?

Hi,
Just wondering if it's somewhere in proxmox roadmap to add some cluster aware filesystem (similar to the VMFS etc) with possibility to configure it via GUI.
I have a bunch of Dell VRTx servers (2/4 blade system with shared datastore) - and the shared PERC is not able to work in passthrough mode, so Ceph is not an option here.

Also having the shared datastore as LVM = loosing snapshot ability.