I love that you've added an Estimate tab. Would it be helpful to show on that tab when that estimate was sent, emailed, and the email address it was sent to? Perhaps at the very bottom of the estimate in view mode?
The sign above if you agree to the contract should be a "sign below" so thatpeoplee read the hold harmsless, check those boxes, the click view for the contract before signing because many people are signing but not clicking view for the contract
When invoicing from bulk invoicing, it just says invoices are created - It would be nice if it redirected you to the invoice or the corresponding invoice page.