Hmm, i would not agree with you.
Sure Vivvo 4 is much more complex than 3.5, but when you get inside templates a little bit it gives much much more options for customization and with a little time spent in them, they aren't so hard to change and customize.
Being with Vivvo for almost three years, since it's beginings, I must say when you get over learning curve, Vivvo 4 is the best and most easily to customize.
It's also much more stable and secure than any other Vivvo version.
But than again, everybody have the right for their opinion right?