Just try not to engage into fight until 3rd rifleman is on the field. And toy with OKW with m20+stuart.
I was one of many who claimed we should nerf stealth-moving rackt, but after many nerfs OKW got and doomed mech truck start; they are just too vulnerable in early-mid game against vehicles.
Of course things get better after first p4, but it's really tough to keep up the pace w/o proper vehicle.
I would not say doomed but very unworthy.
t0 rak is still op as fuck and allows you to play infantry with 100% safety since you pop 290mp and at any point can tackle a LV like T70, AAHT, etc... it's just too good to be true even with the cloak nerf