No...if anything it will get more difficult...Ref new regulations and costs for work permits etc...
Think the biggest issue with immigration in Thailand is not the rules per se, but the number of times these rules change..
If you are under 50, ie retirement age, its is very difficult to live in Thailand long term, only real solution is the Thaielite card which at least gives the possibility of living there long term.
For someone under 50, without a job in Thailand, this is a viable option as not have to be doing visa runs all the time
As regards owning a house, this is not going to change, I personally would like to see a 99 year lease system they have for forgieners wanting to buy properties in countries like Cambodia and Vietnam and the second home program they have in Malaysia.
Personally think there should be some provision for people working/living here legally and paying their tax to buy a property...ie say lived in Thailand on a work permit/retirement visa for 3 years, paid taxes for that period would be allowed to buy a piece of land up to 1 Rai in size, think this would be a fair compromise.
Lets face it, Thai nationals can buy property and land in the UK and US without restriction...Ex-PM Taksin springs to mind, and he bought a football team...!!!!
EDIT
Khun B, you have the right idea about renting would do this for at least 12 months, if you do eventually buy, as I am sure you already know owning a condo is the only definitive way, with any form of legal recourse if things go wrong, which they do quite frequently in Thailand, if you are thinking of a condo as an investment, dont bother, unless its one of the upmarket and very expensive condos around BKK
The thing people get confused about is the there is nothing stopping you "owning" the house, the issue is the land it sit's on.
EDIT
To add to James B comment about permanent residence in Thailand, its just not a case of living here legally for 3 years there are a lot of other conditions as well to be complyed with for PR, and PR in Thailand doesnt give you the right to own land or even work, persons with PR still need to apply for a WP. All basically PR does is takes away the hassles over visa's thats all.....to get all rights you need to take out citizenship...the PR process is the first step and it takes many years to citizenship..