The reaper, get it? REAPER! They giving it regen after battle like Protoss shield.
So why dont you just make it a Protoss unit?
Current state of Reaper in WoL: TvZ/P: useless map control early game, not really significant usage.
TvT: counter early hellions which ultimately make bio > mech.
Clearly removing Reaper from Terran army wont have any major impact in TvP and TvZ mean while it will increase mech usage in TvT a lot.
So how do we give it to protoss with out breaking any matchup?
Came from gateway(non-wrap only)
stat could be modified.
Well early game extra scouting information is great for both PvP and PvT. The stat could be modified for PvZ so it wont force roaches too much. Forcing this unit to be produced from a gateway but wrap gate will give an interesting usage in changing wrapgate into gateway :D.
The only problem with this is that its too easy to gain highground vision to wrap in as Protoss: HoTS u cant wrap in to high ground -> fixed :D