Perhaps, but block placement is already hurting as it is.
From /perf on creative:
Top 10 longest events:
onBlockPlace: Max 77, 69, 66ms; Ran 43617 times.
onBlockBreak: Max 76, 74, 72ms; Ran 29509 times.
onPlayerInteract: Max 35, 7, 3ms; Ran 116107 times.
10:22:47 [INFO] Current 10 slowest events:
10:22:47 [INFO] onBlockPlace: Current: 0.75 +/- 7.88ms Ran 44423 times.
10:22:47 [INFO] onBlockBurn: Current: 0.19 +/- 2.22ms Ran 3065 times.
10:22:47 [INFO] onBlockBreak: Current: 0.36 +/- 0.95ms Ran 29955 times.
Moah block placement lag for a block type that isn't used that often?