no rule changes per se. But upped enforcement especially for high frequency border bounces. Not likely to have any effect on legit tourists. Time will tell i suppose.
for wasting your money. For Canadian passports, you get 60 days visa exempt. And can always extend for 30 days more at any immigration office for 1900 baht
If you have applied in Australia, whilst being in Europe, you will quite possible be rejected and forfeit the money. A face to face interview is unlikely, but if they request it and you don't comply, they will also likely reject the application and you forfeit the money. You could have simply applied in the country you are currently in. Let us know how this plays out.
You are not a resident. And you cannot reside in Thailand. You can stay. You can pay tax. But you are a tourist/nomad. Go be nomadic. Or at least understand the intent of your visa. You bought a visa for $300. Doesn't set you up for success.