the main gripe is that people cant really spend their funds until the chain is uptodate. which can be days-weeks to set it up

if only there was a smart dev that could think of some simple solution..
like

an uptodate UTXO set of (lets say current blockheight minus 1) gets its own hash. and that hash is set in the current block data.
making the UTXO set of 1confirms+ verifiable as part of block checks

thus people can then have their wallet grab a very recent UTXO set FIRST. so they can actually go ahead and spend their funds, the same day.
after all sending out a tx using the UTXO set wont hurt the network. if it contains a input that is actually spend or non existent it wont get relayed/accepted into a new block anyway..