Valve has been developing Dota2 at a frantic pace. Dota2 has been a standard and has been pretty balanced in the development of the game. Ice Frog himself is in complete control of the various aspects of the meta game. he has been instrumental in developing the game to the satisfaction of the community keeping in mind the casual and esports side of Dota2.
A couple more points from this morning's meeting "We would like to move a lot quicker on new hero development…" 1/3
— Matthew Bailey (@Cyborgmatt) August 1, 2017
Valve will be moving forth faster on new hero developments. While most of the current pool of heroes are ported from Dota1, with the list having been exhausted already we will be seeing more and new heroes coming soon.