Well maybe By Design, but it would seem better to maybe find a different echo. Please see below:
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Case: PC communes Wrath on 2PC that curses the 2PC. 2PC can see in affects:

Commune: 'wrath' modifies save vs spell by 14 for 10 hours.
Commune: 'wrath' modifies hit roll by -7 for 10 hours.

Expected: Echo after Wrath affect wears off is something specific to Wrath.

Actual: Echo is instead....


east west]
The curse wears off.
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If its by design or you don't want to tackle it totally ok, just seemed that it could have been a different more relevant Echo.