Surprisingly, TJ, he has no trouble coming up. These aren't big enough for him :P [he jumps flat if the jumps are little, because he's lazy and can get away with it, but the bigger they get the better his bascule and usually the distances he insists on are better too]
I can get him to chip in now and then but he does really love jumping and in a snaffle I don't have quite as much control. He can be a little strong, so if I have him in his pelham he's great and we hit the right spot 9 times out of 10. Oftentimes I set him on a stride length and then in the last 3 strides he just takes over. He's a very experienced jumper and I'm... not... so he thinks he knows better than I do...
I also think I tend to see the distance for all fences as if they were verticals, I don't have a lot of experience with oxers... especially the big ones. His scope isn't what's keeping us at around this height, we can do and have done bigger together, it's my confidence that's the issue. I haven't actually done much in the way of jumping in quite a long time. A session here, a session there, always months apart. And we're just coming back from a break due to him having a knee problem.
I'm not making excuses, I know it comes across that way but I'm not. He's quite unique, we've gone through six instructors trying to find one who actually gets him and we're currently on the seventh. So far so good... the other six instructors either made matters worse or let my riding plateau... but I haven't had a jumping lesson in over a year so it doesn't surprise me that I have a few bad habits. I'm just glad that my lower leg has finally started to come back to me.