Absolutely right. In the earlier DOTA versions, there were even side lane shops, and the combination of those side lane shops and the Secret Shop throughout the 6.4x to 6.6x patches made it feel like I was playing a stat-driven RPG map. Shop system in the modern DOTA 2 has been simplified, yet...
Further optimize item slots by reintroducing a 16-slot system (12 + 4).
Add unique items and new slot mechanics.
Each hero starts with 12 item slots(no color restrictions).
The remaining 4 slots are locked initially.
1 slot unlocks for destroying all Tier 1/2/3 enemy towers respectively...