Yeah, Osth will sound like you're lisping
when are you going to say it? I have never "said" PE I have only typed PE so...it makes sense to say Osth
You can only speak for yourself, if anybody wants to shorten it while speaking in a shoutcast they will say 'Ost' not 'Osth'. Or just use plain 'Ostheer'.
Also, on a personal level, when i'm reading a forums I read inside my head. Osth would just get plain annoying since you don't pronounce it 'Osth-eer' you pronounce it 'Ost-heer', like 'Wehr-macht' or 'Brit-ish'. Do you call the Wehr 'Wehrm'? lol...