1. Wrong. Where were these 'steel plates' located in your opinion?
2. Completely wrong. Even the DOW for the complete 109 was only ~2000kg and what's 'crazy' about using a 1370hp engine?
3. The Spitfire has an very similar narrow track landing gear, what's so 'crazy stupid' about it?
4. Don't know where you've got this 'info' from.
FYI, the first 109 versions had only ~700hp engines and the landing gear and tail size were perfectly adequate for these versions, absolutely not 'deadly'.