Lines are quoted from the official notes; buff/nerf tags are auto-classified from the numbers and can be wrong. Covers the 14 most recent Dota 2 patches PatchMeter has fetched.
▼nerfBase Movement Speed decreased from 310 to 305
✕removedRemoved Defense Matrix ability
✕removedLaserAghanim's Scepter no longer adds bounces
⇄adjustMarch of the MachinesNow upgraded with Aghanim's Scepter
▲buffRearmCooldown decreased from 7/6/5s to 5.5/5/4.5s
⇄adjustWarp FlareTeleport distance now depends on Warp Flare cast range and scales with distance from Tinker, so that nearby enemies are teleported further than far enemies
▼nerfWarp FlareMax teleportation distance is 60% of Warp Flare's cast range which decreases down to 0 at the max cast range (700 by default)
▲buffTalentsLevel 25 Talent: Laser AoE increased from 200 to 250