Excellent analysis by David.
OTB, I have seen 54S-11 misplayed as N several times. I've never seen E played, even though everyone seems to get it right when asked. Not that there is much equity at stake.
Many years ago, when opening 43S was sported more frequently, I also saw 43S-11 misplayed as N most of the time, where a relatively significant amount of equity is at stake: .054 by (5k) GnuBG rollout though less than that by XG rollout (see below). It's not even clear that N is the second best play.
In addition to the insightful points made by Mike and David that apply to 54S-11, there is also an extra blot in the outfield (which one is more likely to hit by splitting the back checkers) for 43S-11.
Key: N (Near) = 8/7(2) 6/5*(2), E (Each) = 24/22 6/5*(2), E.(Each 1:3) = 24/23 6/5(3)
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| XGID=-a---aE-C---dE-a-c-e----B-:0:0:1:11:0:0:3:0:10 | |||||
43S-11 ..[E N32 E.33] "<=5 | |||||
| 1. | Rollout1 | 24/22 6/5*(2) | eq: +0.408 | |||
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| 2. | Rollout1 | 8/7(2) 6/5*(2) | eq: +0.376 (-0.032) | |||
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| 3. | Rollout1 | 24/23 6/5*(3) | eq: +0.375 (-0.033) | |||
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| 1 5184 Games rolled with Variance Reduction. Dice Seed: 25540072 Moves: 3-ply, cube decisions: XG Roller | ||||||