Thoughts on how this recipe should taste

This is my first all grain recipe, an English india pale ale. It tasted very malty after primary, so I wanted to dry hop it to add some aroma to it. I'm not sure if 4oz was too much or just that I don't like EKG. But, it tasted way different. It almost had a chocolate after taste to it. Granted this was just the left overs of a hydrometer reading but I didn't like the taste. Anyone have any thoughts. On paper, this recipe should taste good (I think). I haven't used EKG but I have heard many good things about it. Will the flavor change significantly with age and carbonation? It tasted good before I dry hopped it (biscuity, malty and bitter) and now, not so much.

Here is the recipe:

Recipe Specifications
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Boil Size: 7.00 gal
Post Boil Volume: 5.50 gal
Batch Size (fermenter): 5.00 gal
Bottling Volume: 5.00 gal
Estimated OG: 1.066 SG
Estimated Color: 9.1 SRM
Estimated IBU: 39.6 IBUs
Brewhouse Efficiency: 77.00 %
Est Mash Efficiency: 92.4 %
Boil Time: 60 Minutes

Ingredients:
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Amt
12 lbs Warminster Floor-Malted Maris Otter
8.0 oz Caramel/Crystal Malt - 60L
1.00 oz First Gold [7.50 %] - Boil 60.0 min
1.00 oz Goldings, East Kent [5.00 %] - Boil 20.0
1.00 oz Goldings, East Kent [5.00 %] - Boil 10.0
0.50 Items Whirlfloc Tablet (Boil 5.0 mins)
1.00 oz Goldings, East Kent [5.00 %] - Boil 5.0
1.00 oz Goldings, East Kent [5.00 %] - Aroma Steep
1.0 pkg London ESB Ale (Wyeast Labs #1968)
4.00 oz Goldings, East Kent [5.00 %] - Dry Hop 5 days

Measured OG: 1.063
Measured FG: 1.018

i would dry hop with 2 oz for the first 7 days then add 2 more oz for another 7 day then let it condition for 3 weeks in the bottle at room temp then at least 1 week in the frige

It's already in the bottle