Yea - as good as Dota is in terms of gameplay and gameplay-related features, Valve's been doing a poorer and poorer job handling its other aspects.
Programmable bots? Believe they've been pretty much abandoned.
Tutorial? Same story.
Guides? I believe they take awhile after patches to get updated/fixed.
Website? Doesn't have talents, the biggest gameplay addition to Dota since... Idk. Since I've been playing, and that's 2010/11.
Custom games? Lol.
Cosmetics? Most of them are Valve-made (it seems like, though I could be wrong) and only come from Compendium's nowadays. Furthermore, the ones in the compendiums all have excessive particles and break the original rules that Valve gave community artists to follow (color schemes, silhouettes, etc.). The ones that aren't made by Valve but are released are pretty awful - see the DAC Compendium (Whoa, another compendium?) and its boring sets.
Other examples of cosmetics that get the shoe-in over more deserving ones are the shitty holiday ones. Valve spends time trying to get Chinese money by doing New Year's events, but the original events that showed alternative game modes and the possibilities of custom games like Diretide/Frostivus are omitted, ignored, or barely acknowledged with a hat on Roshan, a mob that is less worth taking than ever.
Finally, Valve's economy has been in the shitter. Any items you get from games can't be sold, you can RARELY buy an item directly from Valve's store unless it's an arcana. They took away level up gifts/items. Again, pretty much all new items flow from Compendiums. Can't remember the last time we got wards from a non-Compendium chest.
I don't play as much as I used to, so please correct me if I'm wrong on any of these points, but Valve barely seems to put any effort into the non-gameplay side of the game anymore.
Fuck this revenue cut, it's completely shitty and seems to be reflective of Valve's feelings on the game lately.