My 2 cents @Jason:

• It would be nice to have 2Gbit or higher connection speeds as Delta is already offering.
• It would be nice that T-Mobile would pay extra attention to peering/routing and the have best in market latency, specially between Europe and North + South America.
• For Gbits connections, it would be nice to have an ONT with a 2.5G LAN port, to avoid port saturation.
• It would be nice T-Mobile to push network providers to migrate GPON to XSGPON in areas where they still have GPON.
• Nice to have for home users: internet backup and fixed ip.