200g LPs - too much bass

Before you give up on giving it a try, may be the following will help.
Try out these steps to adjust the VTA for the Ekos on an LP12:
1. Mount the LP12 on a jig with the baseboard/Trampolin removed.
2. Make sure your arm is secured in the armrest.
3. Stick some masking tape between your platter and top plate but allow some slack for vertical movement of the suspension. You just don’t want the platter to spin.
4. Take a piece of about 6x3 inch hardboard and draw parallel lines with one tenth of an inch gaps. Number these lines.
5. Make a base for this board so that it sits upright (180degrees) and put it on your platter (with a flat record in place) between the spindle and arm pillar.
6. Place arm onto record and take note of the line number where the arm tube is. Your eye has to be level with the arm tube. Use this line number as the base reference point on which you make adjustments.
7. Remove arm and secure in armrest.
8. Facing the TT, on the right of the arm collar there is a hole where the bolt to adjust VTA is located. With an allen key (no. 4 probably), slowly turn the bolt in the arm collar anticlockwise. If I recall, it should be a spring loaded so the release is gradual. Even if the arm pillar drops, you need not fear about your cartridge for as long as your arm is in the armrest.
9. Once slightly loosen, you can now adjust VTA by slowly moving the arm pillar. Only do this from the bottom by gliding the arm pillar up or down. This means you need to have your hand in the plinth. Pushing or pulling from the top may wreck your bearings!
10. From the reference point, move the height of the arm incrementally. Moving up will reduce the low frequencies; the problem you are facing with 200gm vinyls.
11. After you have moved the pillar up slightly, finger tighten the bolt and repeat Steps No. 5 through 7, taking note of your new reference number. How much you move will depend on your ears and don’t worry about not having the arm tube parallel to the platter. Never use another tool like pliers for leverage on the allen key to tighten the bolt because over tightening may bend your pillar and wreck your bearings.
12. Check VTF or stylus pressure (unfortunately changing VTA also changes VTF).
13. Then remove platter, remove your LP12 from the jig, put back the baseboard/Trampolin and place it back (with the platter of course) on your rack.
14. Power up, pray hard and listen.
15. If your prayers are unanswered, you may take it as retribution for indulging in a hobby by neglecting your duties, so repeat Step No. 1 onwards!
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Note: The assumption here is that your cartridge and LP12 are already properly setup, you only need some basic skills and the necessary tools. Major adjustments on the arm pillar will also affect the tonearm cable which may impact the bounce or even touch the base, so keep a watchful eye on this.
VTA is a contentious subject amongst both designers of cartridges and tonearms alike. For example VDH whose cartridges are angled at 22 degrees recommends a few additional degrees. Most tonearm designers do not provide for VTA adjustments despite knowing for a fact that vinyl comes in varying thickness, not to mention old vinyl were cut differently. So the best bet is to trust the most valuable tool, your ears.
BTW, try to google Jimmy Hughes (LP12 setup), Russ Andrews (LP12 jig) and Geoff Husband (VTA); you can learn a bit more about setting-up the LP12 and VTA adjustments.
The Ekos is a very good arm and generally viewed as better than the Ittok so partnered with the LP12 you should be able to maximize your AT cartridge. In terms of sonic priorities, the arm does come ahead of the cartridge even though the Ekos is certainly capable of much better choices.
The above are mere suggestions in addition to what has already been written on this forum. Decide what you think is best and if you are still not confident enough, call 999. You now need help!