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"Visa should establish a minimum transaction amount below which PINs are not required."

VISA INTL has a VISA Easy Payment Service No signature required program. For two merchant categories, the limit is up to $50.00. There is also VISA Paywave with NFC and it does not require the pin. There are similar VISA offers in the UK where the pin is not required with NFC for transactions under 20 quid.

"Let customers block and unblock theirs cards via their mobile devices,.."

Excellent idea from Mr. Pyziak. I designed this system way back in 2000. We've been offering it to banks since then. Offered it through CardSwitch Technology and now through Wembix. Banks were not happy to offer this system to their cardholders. They told us that this system made their cardholders worry. And you know what? I agree. 

But with the economies tanking since 2007 and more and more debit cards are in use, cardholders are asking to have this control. I need to add here that Mr. Pyziak and I do not know each other. But thank you Mr. Pyziak.

"I agree it's not ideal, but our decline rate would be higher without it and the Card Schemes are looking to improve the customer journey through the launch of their wallets ....."

Personally, I use Paypal or KLARNA (whichever one is available) because all I have to do is to type in my userid and password.

Whatever happened to V.me wallet which I first heard of in 2011? V.me wanted to do the same Paypal identification process (userid/password)...

"Silly you might say, but if we have the data and the models to show that our customer buys his coffee at 08:45 every morning at this merchant for this amount, and his phone GPS says he is there now - do I really need to check all the cryptography, and validate the PIN?," "

Isn't that what NFC was supposed to do? Does this mean that VISA does not like NFC? Some people also prefer privacy and they don't turn on their GPS... they don't want to be located...

Is this really a problem worth solving? Using the example given by the VISA Exec, the time it takes to check the pin and all the cryptography does not bother cardholders.  

If this is truly not yet known to VISA execs, I would like to say that there is one problem that is worth solving. That's the Verified by VISA. Most complain about VBV. It is inconsistent and it adds a lot of steps into an online transaction. 

In 2009, PSCU (company that offers services to credit unions in the U.S.) spoke about offering Card Control. But CardSwitch Technology Ltd. was already offering this system. You can google PSCU and CardSwitch and it will show you all the articles dating back 2009 about Card On Card Off.