Burke is 21, one year older than Sam Field who we still talk about as needing development and loans to get games under his belt.
Burke to me looks to have raw ability but is a bit wild/ unpredictable and has stagnated for a few years now.
Either we play him, loan him out or sell him for what we can to get his game time and thus experience/ confidence up. Personally, I'd loan him out to another championship club so he can play every week. we can then see what he can do.
Otherwise, we're wasting more money and time on him. Still, 15m, even by Pulis's standards of wasting our money now seems to be about 10m too much even in today's market and was based on about 15 good games for Forest because it doesn't look like he much in Germany either?