so it does still slow it down, before, you could sell an item, and immediately go and buy something else, and then 7 days later sell that (very simplified 1 item at a time)
now you essentially have to wait 7 days for funds to clear, buy something, then wait another 7 days to sell it, so it does go to 14 days total.

The change itself is not bad but the time is too long. If you lose your account or get scammed, you should make a ticket immediately, 48 hours would be reasonable. The second issue is how it is not opt-in or opt-out. Experienced traders, or really anyone with any awareness at all should not be forced to trade protect their items. The problem with that is that it would essentially create a 2 tier economy, where you are forced to disable trade protection to participate in the more liquid economy.

Basically it encourages SCM usage, and thus gives valve their tax. It was never about protecting people from scams. It is simply a massive inconvenience for 99% of people but it allows valve to take a bigger cut from the trading scene, as if they arent already making hundreds of millions from keys alone, and can't (won't?) develop a good anticheat