EasyBCD isn't a bootloader. It's an app to help you manage the Vista/7/8 bootloader's BCD store.
If you install EasyBCD on W8, you should be able to add entries to its BCD for W7 and Ubuntu.
You don't say how you installed W8.
Adding it to a PC with an existing BCD on the active partition, it should have auto-multi-booted itself, but if you installed it blind, to a new HDD, it will be unaware of the other systems till you tell it about them with EasyBCD.
Yes, the new Windows 8 "touch-friendly" boot screen only shows Windows Vista+ entries. Linux entries aren't shown on there, you'll need to use the legacy interface for that.