It’s anecdotal of course but, when he makes the exact same basic baserunning errors repeatedly, there’s only 2 real scenarios. Either he’s being instructed properly and keeps making the mistakes anyways…which would indicate he’s uncoachable…or he’s not being instructed at all. I find it hard to believe it’s the latter.
Now, there could be a sit auction where the term uncoachable means one thing to one person and one thing to another. Some take it as a guy who refuses to listen to coaches because he thinks he knows better, others see it as someone who absolutely listens but then forgets anything because he’s a bone head. I don’t think it’s the former in Vlads case.