I am just under the impression that KT just out shined all blitz tigers. Now that for super tanks like Tiger/pershing, you can only filed one at a time, which is a great change IMO as I have to say 2 pershing is way more gayer than 2 tigers.
Anyway, come to think of it, now defensive doc still gets nothing, a redistribution of tigers would be great to all 3 docs. Lets say put Tiger Ace in Blitz doc, give defense regular tigers, or let defense have the Tiger Ace. Either way, you get all the tiger choices of all 3, make defense doc a good viable choice.
On the note for Flak88, it is still too painful to build it as it draws too much resourses and not as half of useful as 105, and its even worse against British due to massive counter artillaries, not to mention its low HP. However, if we can build the flak88 like a british defense structures, like a sandbag wall around it when it is built, or cremic concrete walls, with some extensions on the sides, give a good defense bonus against artillary fires, and infantries can take heavy covers near flak88's wall extension. Just a thought after I played defensive docs a few rounds after OF released.