where do I begin...
I understand your frustration but...
1. NO receiver in the last 10 years that I know of, certainly none from the big names Denon, Yamaha, Onkyo, Pioneer, Sony, etc has had the ability to send digital audio to multizones. When they had multiple digital outputs, you could send one to one room and another to a 2nd room but that is not what's meant by true multizone, where you can have 2 different sources playing at same time going to different rooms. I've owned 4 Pioneer Elite receivers over past 8-9 yrs with MSRPs of $4500 - 7000, and none of them did what you are complaining about. and during that time I downloaded & read thru all the major competitive models from Denon, Yamaha, etc to know how they compared.
2. despite your complaints, be lucky that you have a 2nd & independent HDMI zone at all. this past summer was the 1st time this feature appeared in ANY receiver in the world! and Pioneer was the 1st out with it. so your whining about not being able to do what you want is unwarranted.
3. receivers are becoming a swiss army knife of features but they don't replace customized multiple room installations as what you are trying to do. there are many external matrix switchers for HDMI, component video, std video, analog & digital audio available from suppliers like HDTVSupply, Monoprice, Ram Electronics to name a few that can do the things you'd like to do.
4. you have no one to blame but yourself for not doing your homework & research ahead of time before you decided to buy the receiver, chop holes in walls and lay cable! that's backwards & your own fault. sorry, but with multiple complaint posts of yours showing up about various things you don't like...I call it as I see it.
5. forum etiquette....instead of multiple posts about one issue after another, try posting your comments in the owner's thread. all of the common, popular models from each mfg have "owner's" threads so all relevant posts about that model can be grouped together for convenience to members posting questions, answers, comments, suggestions and general advice to people who own it, potentially thinking of buying it, people with problems, etc. there is one for the SC-68/67 which I started and which has had recent posts from last night...surely you couldn't have missed it
finally, now that my rant is about over, I'll see if I can sort out some of your problems and give you some help if I can. and that's predicated on you not deciding to take it out on me for your own mistakes in plunging in before you knew how to make it work.
this is NOT a lame receiver. Pioneer is considered 1 of the top 3 companies in HT receivers, an opinion shared by many enthusiasts & AV reviewers. the top 3 companies are Denon, Onkyo, Pioneer. And the bigger brother of yours, the SC-68, has been reviewed by several publications & enthusiast sites, like Home Theater Magazine, and given top ratings.
Don't blame Pioneer or the receiver because it doesn't do what you thought
do. from your posts, none of them can.
It's not Pioneer's fault you didn't understand the manual before you installed cables & wall plates. you could easily have posted questions here ahead of time & gotten help on how best to do your rooms from people who 1) know their stuff & 2) are freely willing to offer advice because they enjoy the hobby.
peace & I'll read thru your multiple posts & see if I can help unravel some of your issues.