Just created a mod entitled Mech Viability Mod and available in the Americas region only with the purpose of redesigning the Tempest and Sentry units.
Firstly, the Tempest can now switch between the Anti-Air mode or Strafe mode (Anti-Ground mode). While in Anti-Air mode, the Tempest can only attack air units whereas in Strafe mode, the Tempest can only attack ground units and is immobile.
The purpose of redesigning it in such a way is to promote positional play for the Protoss race whereby how you position the Tempest in between modes plays a deciding factor.
The below Tempest in Anti-Air mode
The below Tempest in Anti-Ground mode (Strafe mode)
Secondly, the Sentry can now morph to a stationary siege unit that is the Vulcan by researching the Sentry Siege mode at the Twilight Council. The purpose of giving the Sentry a stationary siege morph ability is to promote positional play where I feel the Protoss race is lacking at the moment.
The below Sentries in Siege mode
The below Vulcans (Sentries in Siege mode) in action
Nydus maximum cargo space limited to 24. This will limit the number of Zerg units that can instantly move from one point to the other via the Nydus Network.
Battlecruiser's Tactical Jump now has to be researched at the Fusion Core. Initial starting Battlecruisers with Tactical Jump is a bit too strong in my opinion.
Raven's Interference Matrix now has a lockdown upgrade at the Starport Techlab whereby it will disable/suppress the movement of the target unit. However, this upgrade requires Fusion Core and also due to its added function of suppressing movement, the energy cost of the Interference Matrix has been increased to 75 from a previous 50 vitals.
The Tempest anti-ground attack has a further Quantum Core upgrade at the Fleet Beacon which adds +3 range to the ground attack.
Feel free to discuss. Thanks.