Since today's Shounen Jump Championship is the ONLY TIME where E-Hero Stratos isn't in the 1per deck slot, (i.e. before the march banlist) I won't be surprised if someone is runing 3x Stratos in his main deck. Heck, I won't be surprised if a bunch of 3x Stratos deck makes the top 8. Stratos >>>>>>>>>>>>>>>>>>>>>>> Gadgets (And thus 1 per deck ruling.)
Yeah, it HAVE to be 1 per deck. It's Gadgets + "potential Breaker" in a 1800ATK beatstick warrior form. TOO FREAKING POWERFUL. At least this way, the "gadget" part of the effect dies. Now it's just "ROTA + Potential Breaker" in a E-Hero or D-Hero deck only.
No BS combo like Stratos searchs Stratos. And then next turn Stratos Searchs ANOTHER stratos. And then uses Premature/CotH to bring out another Stratos (Probably died with a wasted card effect by your foe with Saku/Exiled/etc) and bust a s/t along with it. And after that Pot of Avarice to fuel back your 3x Stratos later on...