Problem with Armstrong is simple, right now we don't know exactly what position he will develop into, a good problem to have, but also one we need to figure out. We send him on loan then it's at the decision of some lower league manager where he plays this season - and that may not be where we'd like development wise.
Still remember Warnock using Ross on the wing for example - a loan that would have done nothing but harm his development in truth.
Keep him in house - if we do loan don't go down the championship route, he's had a season there already, if the lads mentally ready then let him go Holland or Germany for a season instead - it did Jarrod no harm.