Starcraft Remastered was designed with the explicit goal of changing as little as possible. The target audience for the remaster is well-versed in the bugs of the original game and wanted them reproduced.

Compare with Warcraft III Reforged. Modding with the original WC3 was extremely popular: DotA started as a mod for WC3, so Blizzard should have focused on compatibility. Not doing so led to the poor reception.