I would suggest reversing the order of radars on the masts. Fore-mast to carry the Type 992 and various ECM and adding a Type 978 navigational radar, and also make the mast solid (as you have it now). Aft mast should have the Type 965 (AKE-1) radar, higher if possible, and the Type 278 height-finder on the aft side of the mast, which should be also plated like the fore-mast, and not a lattice-work (like now). This arrangement worked fine with the County class destroyers in Real Life. You also have alot of un-used space on the upper-deck between the two funnels. Also keep in mind that Sea Slug had a horizontal tunnel-like magazine, which used a lot of hull-volume, which, incidently, introduced the RN to the problem of volume-critical ships. Type 901 guidance radar of the Sea Slug is too high in the hull IMHO, and that will result in a high centre of gravity.
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Thank you Kim for the crest
"Never fear to try on something new. Remember that the Titanic was built by professionals, and the Ark by an amateur"