Hey James - so personally I would say this is fine. You're within your rights to send it back, or ask for a partial credit of Aldi, about that small crack in the internal ceramic. But you'll probably get another crack or two once you fire it up to temperature and they won't cause any problems. Any replacement (if Aldi get more in stock in June) would require you to fight it out in the online queue early on a Sunday morning, and might well get delivered with a minor imperfection somewhere else. Or even, like mine and others, completely smashed.
On the crazed glazing I've seen this on most kamados and wouldn't worry about that either. These things are going to get dirty and the differential of thermal expansion will likely result in crazing also. Again, not something I'd worry about. My Lidl kamado is crazed also.
Your options are open, but as the ancient Chinese proverb goes, "an Aldi Kamado in the hand is worth two in the bush"