I've used the Scottish system somewhat and the English system a lot. I'm not nearly as much of a fan of the Scottish system as most people on MN seem to be (mostly people with no experience of it, it often seems to me). I detest the offers over system, which can be a real waste of time and money, and it's a myth that offers are binding. (I also know a few people who have bought and sold in France and that's by no means without its horror stories either.)
I agree the English system has some gaping shortcomings though, and to my mind what's wanted is a kind of pick'n'mix overhaul. As I see it, the main problems in the English system are the way EAs conduct themselves, and timewasters.
I personally think EAs should only be used to market properties - take photos, conduct viewings if asked, act as introduction agencies in effect. I think it should be easier for sellers to bypass the EA role if they want, and be able to access the online portals like RM direct. EAs are not professionals, apart from the few who are also surveyors, and if they have a code of conduct, well, it doesn't have teeth. We all know they take it upon themselves to blu-tak failing chains together with lies, that they coerce buyers into selling through them to get their offer favoured, that they overvalue to get the business, that they encourage gazumping, and so much more - I'm sure you all have your own stories. I don't think EAs should be allowed to offer financial advice or conveyancing, as there are conflicts of interest. Both offers and the progression of sales should be done by conveyancers imo.
I think sellers should have to reach a lowish bar before houses can be marketed. As in Scotland, sellers should pay for a basic survey done by the surveyor for the area, providing a valuation and basic info that would allow buyers to identify money pits in advance. Buyers should then be responsible for their own detailed surveys and reports. Sellers should have to evidence legal availability for sale and everyone with a legal interest should have to agree in writing. Probate should be granted before probate properties can be marketed.
Crucially, buyers should be better vetted. If you're getting a mortgage, you should have your offer in principle in hand, if you're a cash buyer, your cash should be evidenced and liquid. This should be done by your solicitor before offers can be made. AMLR checks should be done before offers can be made. No "cash buyers" who are going to have cash when they've mortgaged or sold another property, finalised their divorce or sold their Sierra Leonean diamonds. Sellers should have the right to limit viewings to buyers who have evidenced funds up to the value of the house.
If requested, a buyer or seller's conduct in previous chains should be discloseable by their solicitor, i.e. have they pulled out of a transaction previously, and if so why. (I accept people could get round this by changing solicitors though there could be some way of digitising their transaction record and linking it to name/address/DOB etc.) Where a house sale has failed because a buyer pulled out, EAs should have to disclose that to new prospective purchasers, with the reason verified by the seller's solicitor. Gazumping and gazundering should be illegal, but if transactions exceed certain time limits, a legitimate renegotiating of the price if the market has changed significantly should be allowed. Properties should automatically stop being marketed once a sale is agreed.
But imo both buyers and sellers should be allowed to change their minds for any reason at any point up to exchange, while understanding that that decision will be recorded and may be used to form an opinion about them in a subsequent transaction.
I'm sure people can add to that list, but I think it would cover a lot of the common stunts that people pull. I don't think it would be too hard to implement either, though there would have to be the political will to do it (and I don't see estate agents being pleased, boohoohoo).