19 v 10. Is this negative EV at a high count?

[muckz]

The question is when your double down will result in a 19vT at what count don't you doble down and how much do the neutral cards affect this decision (how significant are the neutral cards) and how would atypical neytral card configurations affect whether 19vT is better played at normal bet or double the normal bet.

7,8,9 are all very significant in this situation. For the OP's context, the chart should be correct, Player 11, receive 8, dealer 10. I would imagine the 7 and 8 would carry large -ev when removed, the simulation should have already accounted for all of that though.

[Three]

I would imagine the 7 and 8 would carry large -ev when removed, the simulation should have already accounted for all of that though.

If you are tracking them it hasn't. Their influence being strong also may demand some risk aversion when not having the extra middle card info. That will depend on your style of play and your BR. I know when I was a red chipper I wanted more certainty as your only real defense against ruin. Now I can easily afford large swings so I have loosened up some but I still like high degree of certainty to be a part of the way I play.