I have no problem with adding house seats. We should probably have 1000.I don't know how that relates to more members? The House was always the democratic part of government, elected by direct vote of the people.
In the 1st House, Maryland had 6 representatives. They have 8 today. Those 8 represent many many more people in a much more complex federal state. Just dealing as ombudsman with VA, IRS, SBA, etc, is no longer close to possible. These House members are far more insulated from the people than that founding era. The people's house ain't as the average congressman spends 6-8 hours per day fundraising.
The House was the People's House, the Senate was basically the House of Lords where the well-connected wealthy resided. We did change how they got elected, but who occupies it is still the more well-heeled.
And of course our House members have stopped going out and talking to their constituents.
The senate should be left as is. Actually should go back to states appointing senators and not direct election. The purpose of the senate was/is to represent states at the federal level.
It was a compromise to let less populous states have equal representation.
Democrats want more senators because they want one party rule.