I’m only speaking from middle lane in WW(inter1), so to add to the above I think as people are similar in standard it would work better to share leading the lane more often.
The pace is never really consistent. The 5 second gap is observed on first length then everyone bunches and catches up for next length then the pace slows over the set. Swapping the leader would sort this out, eventually making everyone that bit faster. Similar to the swap overs on a group cycle
Also point E above should reserved for Ego. If your feet are being tapped like crazy pull in at end of that length and let person pass.
Tapping overall will reduce if the leaders keep the pace up with swapping above.
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like us 
