Trying to think of ways to keep these RAs useful while removing the incredibly anti-fun situation of blowing all your long CD RAs on a fight only to have the opponent disappear. What about giving these RAs a health threshold that is required to use them, this way they can still be used to escape undesirable situations but cant be used towards the end of a fight. SoS would obviously still be useful on inc in group fights and to get inside sieged keeps etc.
Going further, I'd suggest having higher levels of the abilities reduce the health threshold, for example:
Level 1 70%
Level 2 60%
Level 3 50%
Level 4 35%
Level 5 20%
This would also add incentive to spec higher than level 1 or 2. If people really want to escape fights they're losing they still can, but they need to spend a lot to do it.
Going further, I'd suggest having higher levels of the abilities reduce the health threshold, for example:
Level 1 70%
Level 2 60%
Level 3 50%
Level 4 35%
Level 5 20%
This would also add incentive to spec higher than level 1 or 2. If people really want to escape fights they're losing they still can, but they need to spend a lot to do it.