my inclination would be to add a "soffit" that matches the other angled wall and even put in a door to the kitchen to let you get symmetry and sit lengthwise in the room.
the other concern is the near squareness of the room...
From Measurements ratio size m bolt ebu iec h 1.00 14.00 4.27 TRUE FALSE FALSE w 1.14 15.95 4.86 l 1.20 16.75 5.11 ax 1st ~note ax 2nd ~note ax 3rd ~note ax 4th ~noteh 40.21 D#1/Eb1 80.43 D#2/Eb2 120.64 A#2/Bb2 160.86 D#3/Eb3w 35.30 C#1/Db1 70.60 C#2/Db2 105.89 G#2/Ab2 141.19 C#3/Db3l 33.61 C1 67.22 C2 100.84 G2 134.45 C3 tot vol tot surf edge area raw rt60 rate Dc mfpft 3740 1450 187 267 0.72 0.23 10.15 10.32m 105.91 134.70 56.94 24.82 ` ratios diatonic stdev modes df eyring fs ~noteh-w 1.14 II 0.34 383 0.34 0.66 165.16 E3w-d 1.05 +I 0.40