Gml i ear you here, game workshop really beslubbered up this edition when it comes to balance, do they intend to get somewhere like age of sigmar? The more i see the less confident i feel about the fact that getting back into the hobby was a good idea :/
That's the thing, I don't think these ridiculous combo's have caused an issue with balance at all. The issue is that some armies are still using rules from a previous edition that have not been brought into line with these seemingly crazy combos.
Necron Decurion and Eldar Craftworld Host detachments can make for some pretty rough lists that Marine players have a hard time cracking, but when you compare that to a Lion's Blade or Gladius Strike Force with two Demi-Companies... those free transports can really swing the balance back towards even. Granted, they may have gone a bit
too far in saying that all transports are free. I am sure if they had kept with the idea they previously had for Assault Marines where they received a 35pt discount on their transports, there would be less complaints.
10 free Rhinos or Drop Pods? No problem. It is when it is the Razorback that contributes to the combat a lot more that there are issues.
Edit: I think I made it worse...
Chaplain + Master
6x 10 marines w/ Grav-gun / Lascannon / Heavy Bolter Razorback
2x 10 Assault Marines w/ Heavy Bolter Razorback
5 Devastators w/ 4 Plasma Cannons / Heavy Bolter Razorback
5 Devastators w/ 4 Grav-Cannons / Heavy Bolter Razorback
92 marines and 10 razorbacks... *shudder*
30 heavy bolter shots
24 - 38 Grav shots
4 Plasma Cannon shots
90 - 160 bolt shots.
And then the marines standing there... daring you to charge them...