So...?
All i can see that to mean is that if lets say his FC average would go down to 22-23 if you take out his test record. His test average puts his overall FC average into proper context.
No it would be stupid NOT to consider him given the last batsman who had a season of good "long form" innings againts joke domestic bowlers in Bopara - ended up looking woeful in test cricket in the Ashes againts a proper international attacks. Added to fact that is CLEAR no other batsman in England outside the main middle-order quartet in Trott/KP/Colly/Bell - in Shah, Andrew Gale, Ed Joyce, James Taylor, Bopara Joe Sayers, Hilderth, Alex Gidman ARE better than him. So yes he can given a go based on ODI form already.
Plus its not as if his entire ODI career has just been where he has JUST displayed innovation, where he has had to slog out, use his reverse sweeps etc. His innings vs Sri Lanka in the
Champions Trophy he had to battle test match style initally & build his innings in order to aid England to victory - just like how Andrew Symonds had to do in his famous 143* in WC 2003.
But just to make sure i'm clear. A good FC record before test selections always remains the preferred course when selectiong players for tests. Just that in Morgan's & England's case for reasons i've already stated - he CAN make the jump in test match cricket already especially for this current tour to Bangladesh.