I owned DNA-0.5 Deluxe, DNA-125 and DNA-225 stock and modified. These amps are very musical and engaging. You can make it work with the focals but you will need to find the right combination of components and cables. I used ARC LS-25 and Ref1 with DNA-225. Good synergy and the combo paired well with B&W N803.
As @soix pointed out, providing more context about the rest of your system will help. Upgrading power cord on the amp will just highlight what the upstream components are doing. What’s the rest of your system, components and cables…any room acoustic treatments?