I am assuming "very many" is "enough to be the difference between chasing Titanium status and just staying LTP for a year or more." Say, you can fund a sample size of 5-10 stays (10-15 nights) where you can look at some prospective IHG hotels in the class/price of hotel you like to stay in.

Burn the very many points before pursuing another chain's status, pay cash for breakfast or some lounge access at Intercontinentals while doing so (and presumably less than what you are paying Marriott for hotel rooms that give you a very mild chsnge in status from LTP to Titanium). Use the money you save for other things. You won't have status but you'll be saving money and evaluating the hotels you stay at.

(Also you can pay $225 USD for Intercontinental Ambassador/IHG Platinum if you want to have status as part of this exercise, Won't be as good as Marriott LTP but it won't be nothing, also comes with a 241 weekend certificate good at Intercontinentals and Kimptons.)

Once you've burned your IHG stash down sufficiently to whatever you think is a suitable number and you've gotten a good feel for what IHG hotels are like in your chosen locations, re-evaluate whether you need additional status and if IHG is going to work. You can probably use that time where you are burning points + paying cash for anicllaries to evaluate if the juice of chasing IHG status is worth the squeeze of staying with IHG. Consider it a free trial without having to invest as much money as chasing Hyatt/etc. status.