False.
While reading your post, I’m witnessing Grab-employed armchair mappers try fixing the mess by replacing it with even more mess before my eyes (2); together with assortments of edits done in the Bangkok area. (1)
The discussion is started with false pretense.
DWG, consider blocking (at least 0-min blocking) all Grab-related accounts until the talk is proceeded, preliminary result posted, and consensus reached on the forum on whether to let this “map improvement effort” (/sarcasm) continue.
(1) @ajaybulls statement’s timestamp is 2018-12-01 13:10:31 +0700. Evidences of Grab-conducted edit after that timestamp are following:
2018-12-03 08:35:58 +0700: https://www.openstreetmap.org/changeset/65109800
2018-12-03 16:27:51 +0700: https://www.openstreetmap.org/changeset/65118257
2018-12-03 16:32:08 +0700: https://www.openstreetmap.org/changeset/65118358
2018-12-03 19:49:47 +0700: https://www.openstreetmap.org/changeset/65124082
This does not count edits done outside Bangkok (which I didn’t monitor), if there is any.
(2) I hereby formally request that DWG revert these two changesets, in whole. These are obvious cases of uneducated micro-alignment edits with no ground truth, which undone the works of surveying contributors.