DarkSavant13,
The best experience is obviously going to be on a PC with a broadband connection to the Internet. The 2nd best is probably going to be on a smart phone connected by WiFi. A lot of Google's apps that are not uninstallable (except for their updates) are usually for an app version that's either preinstalled with the Android OS by Google (who authors the Android OS) for many wireless provider's device's, or are established by certain wireless carriers to be included as part of a specific device's customized software to optimize it's functionality, often to offset its limitations (which is usually done by the device's manufacturer under contract with a particular wireless carrier to additionally include certain proprietary apps & software which is not often noticeable to the owner of the device that it is even running). There is a certain amount of variation here.
As you already noted, this is the main motivation for most people who root their device, to gain control over it, choose what it does, and customize it into an efficient device that finally works properly without the internal memory being consumed by preinstalled background running apps. The main problem associated with the details of the above paragraph, is the uninstallable apps are usually packaged into the ROM chip where the Android OS is located, and therefore inaccessible by normal means.
The current version of Google+ at the time of this writing for Android OS based devices is 2.6.1.30454518. As it is installed on my device (a Motorola Droid 3) it is occupying 26.30 MB of internal memory, with just under 1 MB used for my specific saved data associated with the app. It should be uninstallable from your device, especially if it did not come preinstalled. The app itself is not written to be transferable to a MicroSD card. It may be possible to achieve this with a 3rd party app, but the amount of data traffic for sending your audio and video stream (video can be disabled), as well as receiving multiple streams from the other members present, may cause the experience to be less than desirable, if it even functions properly at all. Even the use of a Class 10 speed rated MicroSD card may not be enough to make a difference on a device that would require Google+ to be transferred here due to lack of available internal storage.
The problem that you may experience using your stock Android browser that came preinstalled on your device is that you will mostly be viewing web pages in a mobile format. I use and recommend Opera Mobile browser for many reasons covered elsewhere in the forum. With this browser I can select from mobile view or desktop view. Of the two I most always use desktop view. This allows me to have the full browser experience when signed in to my Google account. While Google+ is accessible to me using either browser, the main problem you will run into is not being able to use the Hangout feature that is used for the development meetings. Upon choosing the "Classic" over the default "Mobile" and then later "Switch to Desktop View" from an icon in the lower left corner, from within the stock Android browser and then selecting the Hangout icon, you will receive the following message; "We're sorry but this product is not available on your device." If you would choose the Opera Mobile browser set to desktop display and select the Hangout icon, a window will appear offering you to download the required additional software with the following notation at the bottom of this window; "Requires Windows XP+, Mac OS X 10.5+, or Linux". While the Android OS is based on the Linux kernel, this is not listed to be compatible with Android, so I personally don't feel attempting to install the additional download would result in a desirable situation.
Sorry, there doesn't seem to be any good news here for you at this time.
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