You are currently competing against bots and autoclickers, having to invest hours of active time just to get a chance at clicking faster than an automated software. You're already more likely to lose, and also lose every active hours you had to put in.
At least, the new lottery system only requires a few minutes of active time for you to participate in, and then forget about it until it's time to claim your Gil back and try for a new spot.
Yes, some people will be unlucky and won't get a house. But that's bound to happen with literally every system until there's enough houses for everyone. Even a weighted lottery.
To prevent people being in a rush, while also making sure that everyone who participate for a plot is commited.
Let's also mention the fact that it makes less attractive spots more desirable, as less people will participate on them because of the high commitment required to participate in a lottery. That gives less picky players a better chance at getting a house if they don't care which spot to aim for.
One lottery per player is to make everyone on the same level in terms of chances. It's also to make people commited to a plot.
The reason why you cannot withdraw is again for the commitment you take by making that decision, but more importantly to avoid multiple players participating just to scare competition away, only to withdraw at the last second because their objective was only to help one single friend to get that spot.
It's clearly not a system designed in a hurry. It prevents a lot of what makes the current system bad (house flipping, RMT, unfair advantages, etc.).
The only reason why they are thinking about not implementing it to all wards is simply because they are wondering if they want everyone to be on an equal footing, or if it would be beneficial to keep the unbalanced system for the people who enjoy it.
The lottery would then become the "last chance" system that would still allow a few to get a shot at it.
Bypassing the timer by relocating allows you to buy a house just to relocate. It's basically an exploit of the system that doesn't really make any sense in a design perspective.
Also, the relocation bypass gives house owners an advantage above people who don't have a house. So, if you don't have a house... well, you don't have a house, but ontop of that, someone who is already priviledged can snatch a spot you were looking forward to try to get. How much more miserable do you want people without a house to be?
Keeping that unfair system just for the few people who want to be neightbors is detrimental to a majority of unfortunate homeless players.
Just be happy to at least have a house when hundreds of players don't.