A lot HAS changed to the game.
From your screenshots, I can tell you’re probably not getting a lot of coins from your park. Sell those useless decorations when you unlock John Hammond and place it where it gets the maximum boost (affects the most dinosaurs). Common hybrids such as Alangasaurus and Labyrinthosaurus produce a lot of coins for beginners but you have to collect from them every 30 min. A coin trap would probably also be very useful for you. A “coin trap” is what it sounds like, a trap for coins. Place all your decorations in one place to give it the highest boost for a creature, and you can move dinosaurs in and out of it to get extra coins. I suggest only do it your highest coin producing dinosaurs as it could be a very tiring process.
Like @DaWise_Weirdo said, the trade harbor is a very important structure (whatever you want to call it) in the game because of the ability to trade excess resources and gain the ones you need. Apatosaurus Fossils give the most value as a decoration (besides VIP buildings and boss statues) and it only costs you coins. Buying some and storing it in your market (yes, you can do that now) will offer you some trades for it. It usually fetches for ~450 DB, around the same amount of DNA, 1.8 million coins (a profit in coins if you have problems farming) and 1 million food. Try to keep your market clear and have only AFs in it to maximize the chances of getting a fossil trade. Yes…boosters don’t exist now and they’re replaced by MODs. They have 0 trade harbor value so try to not have any MODs in your market.
Also, the exit out glitch no longer works anymore. Having a balanced lineup is very important now. If you REALLY have to, sell your T rex. It’ll make PvE much easier. A better option is to fuse it into an Indominus Rex and leave it at level one. Remember, PvE is based on your top 3 dinosaurs so keeping your lineup around the same ferocity will make it easier to do without buying back your creatures.
There’s also another Island, Isla Sorna, unlocked at level 35. If you’re out of space you can put things there…
Definitely not all the changes made to the game but that’s all the big updates I can think of right now.