first and foremost thanks for the feedback! We don’t intend to remove the classic KNIME Analytics Platform look & feel while we’re still receiving constructive feedback from you. You can go back to the classic look & feel and continue working there if you want 
We are already discussing (and addressing/*) the incoming feedback (thank you again) - that was one of the main points of the “Early Access” version of KNIME Analytics Platform 5 to get our community involved, well, early. Please keep the feedback coming!
Cheers,
Christian
/* Dropping nodes on nodes and connection is in the works. Quick Node Insertion will get a search, too. This might reduce the need to use the node-repository and you can save some space in your editor. And: We’re working on making all Community Extensions available again.
/** @rfeigel we’re also continuing to work on the new visualization nodes (see e.g. KNIME new Visualizations Nodes). Happy to hear your input on that, too of course!