Other than Super Speed and Infiltration, which travel powers include a stealth component?
Answer: none.
To say, then, that travel powers (plural) with a stealth component have created an expectation of non-exclusivity with Stealth/Hide/Energy Cloak/similar powers implies that multiple examples of these types of powers exist and that they all follow a pre-defined rule. This is clearly untrue. No pre-existing trend laid down any expectation that any travel power with a stealth component had to be stackable with Stealth, or Hide, or Energy Cloak, or what have you, because one power does not and cannot indicate a trend, a rule, or even a reasonable expectation of similarity.
Infiltration is not Super Speed. Nor does it need to be. If anything, Super Speed should remain the only travel power with a stackable stealth component as incentive to take it. God knows, it's got shit else going for it (unless one enjoys face-fucking walls and being stuck on 1' terrain variations, in which case, Super Speed is probably orgasmic).
Daft is expecting any two different powers to behave identically simply because they have some similarities.