I had no problem upgrading to v6. However i think the obly additional feature (i noticed) was the duty time graphis, which are difficult to handle (no split-duty rules).
I think the pricing is okay, as it is an awesome product and with the universal app (iPad and iPhone) they made a step towards the rigt direction.
But in my opinion, the upgrade from v5 to v6 shouldn't have been so expensive.
On the other hand, it is not possible to do a payable upgrade with apple products yet. So it is difficult for them to find the right balance between cheap upgrades for existing customers and the right pricing for new obes.
Cheers Mac