Honestly I don't hate this. I sympathize with JS engine authors trying to balance security/perf with ergonomics. Given the CVE count and dumb perf bugs like "var is faster than const/let", it seems like a losing battle.
JS is already quite good, and it would be sad IMO if it became like Perl where there are 20 ways to do everything. And of course if perf/security suffer. JS0/JSSugar seem totally reasonable to me.