heuhen, Blackbuck, acelanceloet, thanks to all of you for your opinion and hints! I have read your messages and that's I am going to do to improve this cruiser:
-Lenghten the bow and move the "C" position Sea Dart forwards;
-Move the Sea Wolf to the deck-edge;
-Place sonars for ranging and Ikara control;
-Replace Ikara and Sea Dart with more up-to-date drawings;
-Shorten the propeller shafts;
As for Exocets, I should say that I placed them on the quarterdeck in the Type 43 style - I thought it would provide better arc of fire to the Exocet. After you comments I have changed my mind and now I think that I'll have to remove the "B" position 6-in mk.XXVI (that's a pity because this is my favourite naval gun and I think that firepower comparable with Tiger-class cruiser will be profitable for NGS, AAW and close-quarters fight with enemy ships
) and place four exocets at the "C" position while the SD will be moved at the "B" position. The other four exocets can remain at the quarterdeck to provide better arc of fire.
As for the big stern and bow heaviness, I have realised that problem while drawing this ship, but I thought that weight of exocets, aft SD launcher, Ikara and their magasines would compensate the bow-weight.
And as for bofors - well, I think that bofors is much better than 20-mm guns because it can be useful to help the Sea Wolf to destroy incoming aircraft, also it is good for fighting small ships like FAC. I have also heard that Type 22 frigates had 40mm bofors at the Falklands.