I just watched the replay at x2 and x4 so I might have missed a few things. Here's what I think:
-bad pick Invoker, you guys could have picked void or even spectre to go with omni;
-way to defensive/ scared; you hugged towers for dear life when the enemy was waaaay over in front -> lost creeps/ money -> got outfarmed pretty fast.
-individual skill (sorry to say) but was close to 0; Lich didn't harass early on when lich is imba, bad early item build for dk/ levi and invoker, wasted skill points in spells not needed at those levels;
-poor map awareness especially omni (left tide to die while he was happy killing some creeps 3 feet away) and tide (played too defensively and was almost never where he should have been);
-you DIDN'T play -cm but -ap (tinker, cm, omni and anub should've been banned - in theory anyway);
There may be more that I left out but in the end it doesn't matter anymore. Too bad we couldn't prepare for this better, have at least a week and make a selection of community players..oh well.
If you guys have Garena accounts, gimme a pm and we'll play a few matches there )Devs included)
p.s. - Dev team had 2 big advantages: 1) they hosted the game so legal map hack (if they used it that's all I'm saying; they may be innocent) and 2) they had vent or they all played from work and therefore talked to eachother. :P