What part you dislike?
I see nothing that I can't easily houserule.
I dislike HD to heal damage non-magically. I dislike the treatment of HP I have seen thus far, in general by 5e blog posts and specifically by this one.
I understand that 5e needs to bridge 4e and non-4e. But you must understand I am not going to buy in (again) to 4e.
I hoped that they would recognize that 4e isn't the only system, give a base system I would enjoy or at least one I could build up to, while giving people who liked 4e a base system they could enjoy or at least build up to. This does not do that. It gives 4e a 4e base system without any discussion about allowing me to make a system I'll enjoy.
Yes I COULD houserule things. But as I've said before, many times, it is VERY HARD to houserule OUT aspects of a game you do not enjoy. It is ALWAYS better to houserule those things in.
If you want specific comments from this article I'll have to re-examine it and post quotes later, just let me know. However, from what sticks in my mind, after reading the article, this thread and making my two previous posts, the thing that sticks out most is the probably the base assumptions.
We don't want DnD to
Need a cleric or healer to function.
-- I can get behind this to an extent. But I would say the same thing about not needing a rogue to find traps, or a fighter to stand on the front lines and attack the enemy. I don't NEED these classes but I'm not going to completely remove the necessity of having them. I WANT non-magical healing to exist. If the party doesn't have a cleric I want them to court a relationship with a temple to get access to healing. I want them to buy copious amounts of healing potions, herbs or whatever is passed off for supernatural healing. I want non-magical healing to be painfully slow and unreliable. That way if they don't have a cleric that is fine, they can get by without one but not as easily as this blog post seems to allow them.
I don't want my party healing every 10 minutes after a fight, just because they can. I see no reason for it.
For me, it is just a slap in the face. They took the mechanic of second wind (which I have always hated even before 4e) and healing surges, examined them for what was essential, then rebranded them onto a new system while trying to convince me it was different. The essential qualities of HS were that they would limit healing, so you can't heal 1200% of your max HP all day every day, assuming you had a wand of CLW. But that was never a problem. Even if my party had a CLW wand they never got as much bang for the buck as people (around here) seem to say they did. It wasn't a matter of healing even 200% of their damage in a day, it simply didn't happen.
The other aspect of course is second wind, which allowed them to use non-healing, a concept which I dislike, to instantly heal themselves by themselves whenever they wanted. Other actions allowed them to do this differently, more often or with frills and bonuses. That only compounded the problem.
It seems to me that what they tried to fix was completely missed by a lack of understanding of what people disliked about HS in the first place. It wasn't the limiting factor, it was the (perceived) healing factor.
Now ask me again, what do I dislike that I can't houserule? Once again, if you have any specific questions I'll be happy to answer those. For now just take it for granted I don't like what WotC is peddling but I will give the playtest a try.