Steinsson subbed at halftime doesnt mean anything pre season.
Its about players getting the fitness.
I watched the game against Aris and Steinsson had a little tussle with there winger, Meggo might have taken him of to not risk a potential red card suspension.
As for Riga, to sum it up easily, he is similar to Dioufy. And if you dont know what he looks like then he is similar to Ricki Gardner

Strongest at being a winger but could also be played upfront, he scored a stunner against Chorley. Had some decent runs against Aris but didnt have much impact, still getting use to the side i suppose.
One more pre-season game against AEK but apart from that i am fairly pleased, all 3 new signings have scored, including Dzemaili who you could count as new after being injured for pretty much all of last season apart from 45 minutes in the FA Cup against Sheffield and a handful of reserve apperences.