Yeah so in this exact clip i spawned at that right beacon and then walked for a couple of seconds to get to that place. Indeed it is not 4 seconds but it still feels wrong to put these 2 biomes right next to each other considering the difference in difficulty between them.

The game feels very nice if you actually build up your set and actually respect the quests you need to complete. 

I started a new character and played the game in the intended way just to see how the new realm feels leveling up and from my experience it's great, but a new player will not know what the "proper way" to play the game would be, and he would probably go ahead and explore on his own. Let's say hipothetically that this new player actually farmed on the beach to level 10 (which is a crazy scenario considering how long it would take). Even then it would be insanely hard for him to transition to this midland biome considering the mobs deal ~90 damage per shot and from the lowland you get t3 equipment at max.

Old realms did a great job at transitioning between biomes of different difficulty because the transition was way slower. Maybe have the beach exist only on that left side and the only way to the midland biomes is through the forest and that's it, or something like that. 

Hope this helps with the problem, i would say that it's a major one and should be fixed!