Let me jump in.
First of all, I would like to know about the statement that
This does not sound like any reports on forums from authors in for example HTML category. The main point here is do we actually trust Envato’s words on statistics without any proof. However I do realize that there is only a small % of authors reporting on forums, but still, it is a sample.
Generating additional earnings and growth of those earnings… now this is misleading at best… how much growth if that’s in average 0.1% per month well that’s a terrible stat and from some reports here, we can conclude that it’s just not worth it.
Interesting, you say when you add in is the main statement. There is a bit difference between an author that earns 10k or 1k on TF isn’t it. And did you calculate the loss of sales because of Elements and predict what could have been the overall growth, if that TF author would not leak sales to elements.
Now questions regarding the Elements:
- When will the payouts occur since you do plan to charge annually and until now Envato needed the whole pay cycle to finish before it can be calculated how big of a share anyone gets? (of course for Envato its all good you guys get your 50% right away)
- How do you expect any serious author here, for which Envato markets represent his “bread” to jump on board without any pricing plans?
- With the experience on elements were initial pricing was promised much higher than current $29, how can we trust your honest intentions on the pricings, you are just asking us to trust you despite the experience authors had?
- So if I understand correctly WP themes will not be a part of the current elements pricing structure, meaning there will be a separate subscription for WP?
- How will you manage the no support rule? For example, a client dl’s our theme and we decline support and then dl’s the competitor’s theme and they help him via email? By current record Envato is doing a terrible job at upholding the rules they set, we have to report even if this is not our job!
- How will the affiliates work, as this is still a big question? Currently, Envato advertising Elements all over the market violates our marketing effort and affiliates marketing efforts heavily.
- Certain themes have 1 demo, other 15 and some 100+, will this be managed, meaning the value of those themes?
- How will extortions be managed, meaning if a client buys additionally a license on TF and then exports authors because well he spent for a subscription already?
- How will refunds be handled, what if a subscriber is not satisfied and demands a refund, will this in any form be transferred to us (to be honest I do not see how you could but you never know with Envato)
I have tons of more questions but would go far too long 
Keep in mind that the notions “we are a private company, we can do whatever we want” is rapidly losing meaning, you are affecting many lives and it is just a matter of time when you start to pay the consequences.
And let me clarify WordPress on Envato Elements is a bad move and I am strong against it!
Cheers