You know what's the most interesting fallout of Wyatt calling Apprentice Tier levels 1 through 4? It washes away the complaint of clerics and wizards choosing their domain and school earlier than level 3 like every other class.
When Apprentice was levels 1 and 2 and you became an adventurer at 3... complaints complaints complaints about how the cleric and the wizard were "better" because they got their specially-named package of abilities in the "lower tier" when everyone else got theirs at 3. But now... with the tier now lasting 4 levels... getting your specially-named package of abilities is no longer the demarcation between the tiers. So it doesn't matter what level you get your sub-class or domain or pact or oath or whatever, because it has nothing to do with becoming an adventurer. You get your special package while an apprentice. Some a level earlier, some a level later.
When Apprentice was levels 1 and 2 and you became an adventurer at 3... complaints complaints complaints about how the cleric and the wizard were "better" because they got their specially-named package of abilities in the "lower tier" when everyone else got theirs at 3. But now... with the tier now lasting 4 levels... getting your specially-named package of abilities is no longer the demarcation between the tiers. So it doesn't matter what level you get your sub-class or domain or pact or oath or whatever, because it has nothing to do with becoming an adventurer. You get your special package while an apprentice. Some a level earlier, some a level later.