everyone seems to get their facts wrong
badspot said explicitly in a post that they removed maps because they were getting hard to work with, since they were messy in code and basically every update they released had to work around maps. they removed it since it was a limitation, and to make up for it released shaders.
if you care to look over the past two years they have released more updates/bugfixes/mods than they have over the previous 4 years.