Jenkinson is pretty much exactly what I'd expect from a young player signed from the lower leagues - generally OK, a willing runner who works hard but is occasionally naive and makes the odd mistake. He is an anachronism; the sort of signing you'd expect to see (and be more utilised) 20 years ago. In the modern era at a so-called big club he will be a backup player who will eventually get bored and leave in his mid-20s to try and forge a career at a team in the bottom half of the table.
His one chance will be if Sagna leaves and Arsenal don't bring in a relatively experienced replacement.
For me it's the in general 18-24 that a player gets really good or not. But the players that get really good have one thing in common, being played. If someone goes from playing multiple games, then join a new team and play a few games a year for a couple years they will firstly almost certainly look worse than they joined simply due to being not match fit or having any sort of form. They also miss out on the chance to really improve. It's desperately important that we should be rotating Jenks into the first team a hell of a lot but as per usual, we aren't.
One of the biggest reasons for our lack of youth development/players coming through is that our youngsters when they hit that age they need games, just do not get them.
Arsenal put a couple in to train with the first team, play them after 5 months when everyone is injured and the team sucks, and they do nothing, then they disappear, then get wages for 3-4 years, then finally leave the club having done nothing.
Jenks may/may not be good, unless he's given games we'll never know. Even at 28 unless he played a significant number of games between when he joined at say 24, he could be a completely different player than if he does nothing for 4 years, leaves, joins some lower league team and never develops.
The thing that gets to me is, we are preventing Jenks even having the chance to improve just to continually play Sagna who causes so many defensive problems its a joke. He's woeful defensively, same goes for Gibbs. Monreal was an older player and we should have bought a known decent player(I didn't see him much at all before we bought him). Unless we give him multiple starts in a row for a few months we'll never know what he can do with good form. He doesn't look anything special though which makes his purchase terrible, but giving Gibbs a new long term contract when he does get starts and still can't defend at all....
Fed up with getting in guys like Monreal/Jenks, and simply never giving them the chance. Can see both leaving having barely ever played, being judged on random one off games when out of form, and having been a complete waste to buy.
If Sagna/Gibbs were world class you can understand but still not forgive the lack of rotation and chances for the back up, but Sagna/Gibbs can't defend, are woeful and we still don't give the guys we bought and pay a chance.