Is the U.S House to small?

Facts : 
1.The House has consisted of 435 members since 1911.
2. The bigger the institution, the less smoothly it often operates
3.From 65 members in its vintage 1789 configuration, the lower chamber grew steadily with each new census count, accommodating the growing population of the country.
4. members of larger districts may have a more difficult time connecting with and representing their constituents.
5.Taking the cube root of a nation’s population provided a remarkably good predictor of the size of that nation’s lower house.


Questions : 


1. What would happen if the House had 50 members just like the senate?
2. When determining the census, is it only the American citizens who are counted?
3. Since population from 1911 has dramatically grown to today, should the capacity be increased?
4. How efficient would it be if the capacity increases?
5. If the House of Rep becomes too big, can it have too much power?